Oh no.
I just finished my first playthrough, after deliberately avoiding the internet so as not to be spoiled. I had no idea what would happen. I had heard about a petition to change 'the ending' but didn't care about it because, Bioware being Bioware, there would be different endings depending on your choices. I always complete all the missions and take care of my squadmates, I was sure I'd be able to defeat the Reapers, have a big party with friends old and new, and then take a holiday with Liara somewhere warm and peaceful.
Boy was I wrong. I didn't expect the condescending little speech from the Reaper Boy for a start. Harbinger, maybe. One last attempt to intimidate me before I sent the Reapers to hell. But not some magical boy who, Battlestar Galactica-style, blames organic life for the machines going psycho. Then the Deus Ex: Human Revolution style 'press a button to get an ending'. What the hell? Wasn't I playing Mass Effect? Was this made by Bioware? It is like they threw everything out the window. What happened to the consequences for all the choices I had made?
I stayed loyal to the whole series plotline (destroy the Reapers) and chose that option. Seeing Shepard engulfed in a fireball instead of leaping onto a waiting Normandy like in ME2 was a little upsetting, then finding out the Normandy was for no reason at all flying through a Mass Relay (with the Prothean guy on board! What the hell, he was on Earth!) and crash landing on some alien planet. WHY DID THEY DO THIS? They said ME3 would be the end of Shepard's saga. What, are they doing a Mass Effect 4: Shepard's Crew now?
I don't know any more, it seems like a complete mess and a betrayal of the series and the fans. Dragon Age II was pretty bad in how the ending was pretty much the same no matter how you played, but at least it had a resolution with the promise of more to come. Mass Effect 3... no resolution (at least, none which paid respect to the established continuity), no more to come (so what if you hear Shepard take a gasp of breath? Bioware have told us ITS OVER. I think they put that in just to rub salt into the wound).