I just finished it. It was awesome. I can see why some people don't like the ending. It wasn't what I expected either, but I can understand the one the is there. It just is so much more epic (in the old sense) than what we could imagine. Anyway, now I can finally watch all the trailers that has come out the last half year. Maybe I'll even find some inspiration for some new ME-themed stuff now. I bet you would like that, eh?
This first playthrough was with my run-of-the-mill John Shepard. Mostly paragon, but with his renegade moments. Played with him from ME1, romancing Liara. Didn't put too much thought into paragon/renegade then. Made him very mixed. He's become a lot more paragon since, but he's still got a bit of a temper.
Next up will be my über-paragon Shepard, romancing Tali, who I kind of like more then Liara, but had to finish with my "original" Shepard first.