I typed out my thoughts when I finished this game, so I'm just going to paste them here. I figure every bit of feedback might help? As for a score... I would say between 7.5 and 8 out of 10. I'm very picky

(warning: I'm wordy)
So! I got my copy on Friday and finally finished it today Here are my thoughts on it, warning: This will be spoiler-heavy.
I've tried to even out thew pros and cons so I'm not being too critical (because I am generally very critical of things But I think if you're a fan of something you should be able to see what they've done wrong so you can help them improve it as well as what they've done right) I did actually enjoy the game, and as for the endings, well let's just say that I've decided what each of my Shepards will get/choose and I've added a lot to them so the endings for my Sheps (all 5 of them) are not quite so similar anymore
Pros:
-It looks a bit prettier, I especially like all the detail on the scars that Garrus has for example. The Shepards have different faces too which messes a bit with importing but you kinda get used to it after a bit. You'll notice a few characters have been given revamps too like Jack, Dr Michel, that engineer dude etc.
-You get used to the auto-dialogue after a while, and if it fits with your Shepard then it isn't too bad.
-The Tuchunka ruins are awesome. So pretty and neat and mysterious.
-Likewise the Asari Monastary is really freaky and scary, made even moreso by the really freaky-scary Banshees. Auugh I hate those things (in an 'ahh! get the hell away from me!' kind of way). Anyway, the only thing that place is missing are dark shadowy figures flickering in and out of the edge of your torch beam or something to freak you out even more.
-Speaking of which the flastlight on gun thing really adds to the atmosphere a lot in those dark spooky places. Although it can get a bit too dark sometimes in general it really adds to things.
-The Rachni!

I was so happy to see the queen again and help her. They're my favourite, I've only ever been able to be mean and not save them on my one mean renegade playthrough.
-Thane kicking Kai Lengs ass even while on the verge of death and mentioning it And that Shepard says this is for Thane when finally killing Kai Leng.
-The Citadel actually feeling populated and like a place busy with people everywhere.
-Legion and going into the Geth consensus was pretty neat

-The new system scanning for stuff is kinda fun... And kindof annoying when you have to keep reloading to try and find that last thing you're missing in a system. Still better than the planet scanning in ME2 though.
-The reapers are pretty awesomely big, and I loved the thresher maw taking one down.
-Missions started short but got longer, environments seemed more varied than in the previous games.
-Cameos of the squdmates who survived ME2, hooray!
-An automatic fish feeder! And more fish! Yayyy! Though my paragon Shep didn't get it because she always has to kill all her fish. Maybe the Prothean could have a snack or two.
-The Protheans turned out to be quite different from what Liara espected, which is a very nice twist. Also their involvement in the Asari history was interesting, too. Especially since I took Javik with me to Thessia and he explained about each of the items
-Vega isn't too bad, he has quite an open and friendly persoonality. Javik is a bit surly but alright too.
-Garrus' romance sounds awesome

-The bit about creating something to leave behind in case things don't work out for the next civilisations was quite a nicely done scene and I liked it a lot. Because it is something you would have to seriously think about.
This is in the middle, because I'm not sure whether it's a pro or con: Eva and Joker and Tali and Garrus can potentially have relationships if you're not romancing them. Personally I found Jokers face in the background watching EDI and Shep talk a bit creepy, and I like hearing EDI and Legion talk more As for Tali and Garrus? *shrug*
Cons:
-Lots of auto-dialogue and not a lot of choices. Seriously, your characters can ramble on for a while between choices. And when you do get to make a choice the middle option is gone now. Instead you have a middle side 'explain this to me' option which still leads back to the remaining two. So for all their 'you don't have to choose one or the other!' spiel yes, you do have to choose one or the other. Moreso than in ME2 or ME1.
-Most conversations and cut-scenes are unskipable and unpauseable (and being auto-dialogue it can take a while before you reach a wheel that you can pause at). So if you replay some bits... Like say the ending, then you'll have to wander off and do something while everyone sits around yakking until they reach the next wheel. And if you're sitting through a long conversation or cut-scene for the first time and are called elsewhere chances are you won't be able to get it to the next wheel quickly and so you'll have to reload and do it again to see the content. And as mentioned you won't be able to skip the content you've already seen.
-I don't know why they still have the 'Map' option on the main menu anymore, because they sure as heck don't use it. I've only seen a map in ME3 on the Citadel, nowhere else (seems the Normandy has one too). Does that really warrant having its own menu? I would love to see more maps like in ME1, because when I'm in an environment that looks very similar to everything else (rocks, tunnels, complicated buildings) I can very easily end up turned around and going back the way I came without realizing it until I end up back at the start. This is why we need maps Bioware, please stop taking the darn things away. They're useful. They also allow me to see what I have and haven't checked out yet more easily.
-Some conversations start when you walk near a certain point. Really annoying if you were just hunting around to see if you'd missed something and didn't want to start that conversation which takes you out of the area.
-That Geth pulse thing in the ship? SO annoying. It was annoying enough trying to walk through, but then you had to throw enemies into the mix too?! Gah! Dodging the reaper attacks to aim the targeting thing was very irritating too.
-I had a bug twice that unequiped all my weapons at the start of a mission except a pistol which wasn't the one I'd had selected meaning I had to reload and reequip all my weapons *sigh*
-You cannot get the Shepard lives ending (no matter how much you do in single player) without playing multiplayer unless you do something like alter your save with Gibbeds ME3 save editor (or buy future DLC I'm guessing). This sucks.
-Pretty much no one really responding or offering sympathy for Thanes death. And Kai leng having a taunt about Thanes death as you battle him, Ffffff! And Shepard just runs off and leaves Thane alone with a stab wound (seriously? They could have at least left a squadmate with him!) Apparently this is because they forgot that people had romanced/would care about him? Um, what about the writers who did his ME3 romance stuff? Did they just think 'Oh look here's Shepard having a reunion with her LI, of course she won't care or need support when he dies.' Legion is treated in a similar way, though thankfully Tali acknowledges his death/sacrifice. Everyone else loves constantly asking you if you're 'sure you can trust a geth?', that geth helped take down the collectors base, ****s! Grrrr (Yes I like Legion a lot as a character).
-3 of my 4 favourite characters died in ME3 D: Thane, Legion, and Mordin. Fortunately Jack survived.
-Killing 5 Banshees at the end battle in London and getting killed before finally getting sick of it and running past them straight to the next button.
-There's this weird thing where people will turn their heads further than they should be able to. Especially if you talk to them from behind. Sometimes it happens during a conversation too.
-It doesn't feel like there are as many cinematic face to face conversations with your squadmates, though there is a fair amount of dialogue barking back and forth instead.
-The game seems to get a bit choppy or jumpy sometimes, especially when those smoke bombs are used. This makes targetting stuff a huge pain.
-The endings are all very similar and... Have inconsistencies/things that don't seem to make sense. Such as the Normandy crashing, where the heck was it going in the first place? Also, why does the control ending just seem to ask the reapers to go away? Couldn't Shepard get the reapers to destroy themselves? Thus ending the reaper threat, without combining everything, and leaving all the AI like the geth and EDI alive.
-People who did the Jacob romance really got screwed over. Sheesh.
-My paragon Shep did the Kaiden romance... There were a few conversations, they had lunch, confessed love and put aside their past confrontations. Then suddenly in a barked conversation I find they've been regularly sleeping together? (this is before the actual sleeping together scene in ME3) Uhh, when did this start happening? I guess I'm not allowed to have a choice or a brief conversation about this?
-While I think the save function may be a little bit better than ME2... Possibly... In some areas. There are still a lot of bits where you can't save. Including some ridiculous ones, like if you step in the decontamination room on Mars you can't save. Step back out and you can save. Step in the elevator you can't save. Step out and you can. Also at the end from the time you wake up battered on the ground forward you CAN'T SAVE. And while there is an auto-save when you get right to the end and it flips you back to a pre-end-of-game Normandy time it also overwrites that end game auto-save with one on the Normandy *headdesk*. To save yourself the headache of going through those horrible slow-mo ending walks three times as I did just copy the auto-save to another folder when you get to the kid, that auto-save will then be just before the end of the game, and you can just paste it in to load it.
-It is a bit Liara-centric.
And two more things:
-That relay jumping noise was seriously making me go deaf until I found a way to swap out the sound effect for something else. That noise was far too loud (as were some explosions), I do value my hearing you know.
- The music is awesome.