Okay, so I loved the game, but the ending doesn't even make sense to me.
First off, the Catalyst repeats the cycle so that synthetics don't take over, but USES the synthetic life of the Reapers to do so? Doesn't that seem like, I dunno, HUGELY hypocritical???
And why would ships and relays be destroyed if you're choice only affects synthetic LIFE? Last I checked, the mass relays weren't fucking LIVING.
Also, like CaseAgainstFaith said, all three endings are practically the same, just with slight tweaks.
I mean, I could live with an ending where Shepard dies but saves the universe in the process. That would be a fitting end to the series and that I have no problem with. But this? WTFH??
If you get the PERFECT ending (including completing multiplayer) there's a cutscene after the credits showing that Shepard is still alive.