I'll play. I like this thread.
1. I learned a lot about my "friends" personal lives that I would have rather not. I hate open mic. PTT (push to talk) should be an option at the least.
2. I learned what shield gate was and how much it used to ****** me off.
3. Certain characters compliment certain areas of the map perfectly and can own it.
4. Having one button do a bunch of things such as run, dodge, take cover, and revive is a terrible way to have a game.
5. Once someone watches you perform a grab kill now that is the most important thing in their life and now they want to take your spots and your grabs.
6. They stopped letting you grab pyros 
7. Blowing up your friends with "nukes" as I call them "possessed abominations" is very fun.
8. Collectors aren't hard as much as they are BS. Shooting through walls, and Scions are nasty with those cluster grenades. (across the map, over the rail, down the ramp, 3 ft bank to the right, along the cover, and right at your feet 
9. Vanguards are like rouges....all the randoms want to play them and in ME3 it means you WILL be running across the map A LOT to revive until you get sick of them and let them bleed out.
10. Bioware is amazing at making MP.
11. If you were smart you would've filled up all your equipment and tried to keep it that way when trying to get guns/characters.
12. I should've never used my lvl 1 and 2 items. I could have had them maxed and got better stuff instead of trying to use them up to get them out of my inventory.
13. The Saber and Blackwidow were my favorite guns.....until the lancer came out 
14. The harrier is nothing but a video game version of a tease. It's sooooo good and you want it bad...all the things you could do with it, but as soon as you start enjoying it BAM it cuts you off. (unless you are playing the demolisher)
15. I guess this is enough for now so this one is going to be......A LOT of gamers LOVE challenges. I view it at some pointless carrot on a stick that you get nothing for, but literally everyone that plays a game will use every gun and every character on every map when you make a digital cookie to get for doing so. And then think I'm a lazy idiot because I don't care to do it (after getting the banner I deem "the best")