ME 1- Played multiple times (over 10) got every achievement except a playthrough on insanity, bought all the DLC and discovered something new in the story and plot every time I played.
ME 2-Played through probably 5 or six times all with carry overs from ME1 was still working on some up to the release of ME 3. Bought all the DLC loved all of it still not as good as ME1 in my opinion but not too far behind.
ME 3-Played 1.9 times. Once all the way through with my bugged imported character that looked nothing like my shepard. Destroyed the Reapers saw that nothing made sense reloaded twice to get the other endings and saw it still made not a lick of sense. Got the import patch didn't work, waited a few days decided maybe I'll see if I can truely get enough EMS to get the breath scene...nope...and magically the import face worked fine and I got MY shepard back. Played through all the bugs and horrible lazy development mistakes that anyone who play tested should have caught since i've seen these on BOTH playthroughs ( really Bioware just pure laziness unless someone said "hey there are all these bugs" and then they just got the answer "nah we'll fix them with patches

focus on the multiplayer! multiplayer multiplayer MULTIPLAYER

) finished the illusive mans base now just waiting for the EC DLC to see if I should ever pick up any of the other games. There just really is no reason to play it again. People whine about the ending and say the rest of the game was diamond encrusted gold, but it really wasn't the whole game feels more like a Cerberus invasion rather than Reapers so many plot holes and two bit attempts at emotion (where the first two did an awesome job) and the sprinkling of previous games where they could have done so much more but didn't. This was the game that made Shepard cannon apparently I played my shepard wrong.
Seriously Bioware so much laziness in this game. When I killed the Reaper on Rannoch it literally told me "We are the order that brings order to the chaos" WTF! might as well have seen how many orders you could get in there.
" We are the order of Reapers that order the Order of Reapers to bring the ordering order to the out of order chaos that runs rampant in the universe so we must reorder it to better suit the order we desire from the chaos that is. *ring ring* uh hello? oh hi, um im in the middle of something can it wait Im trying to explain the order of things to the feeble minded human known as shepard...what? yes i know its beyond his comprehension...yes yes i was just telling him about the order we bring to their chaos before you called...damn it harbringer you never let me do my job you always have to look over my shoulder...i..no..i..im hanging up....what? no I didn't order the pizzas for the victory party on Earth I haven't had time...mhm..mhm..yes if they don't get the order there with in 30 mins its free...but you have to place the order first...okay okay...let me finish here and i'll order it sheesh. *click* Sorry where was I?...oh right we are the ying to your yang, the order to your chaos so therefore we bring order to chaos are you following me?"