What a bittersweet ending. On one hand, I knew that Shepard had to die in order to have a more meaningful ending, but on the other, I'm disappointed at how fucking ambiguous it was (I got the one where Joker emerges as a dude with robotic eyes).
I think everything was all good until the very end. The last section you can walk around and talk to your comrades before going to war was fantastic, and it reminded me of the long journey up to that point. However it pisses me that, other than the quick conversations you had with them, you don't know anything else. I would have liked a more epic ending, with videos showing every member of your squad helping out in the war and stuff.
Now talking more about the game, it was fantastic. My favorite is still 2, because it had such an amazing atmosphere and sense of mystery. The combat and level design in 3 is the best though. I really, really, really love the combat. Pausing the game, switching powers, telling my squadmates what to do--- so good.
It was a nice journey, but I'm sad that it ended.