So, seeing as a lot of the last page is just a series of spoiler tags - I've re-opened a new http://www.gamesas.com/topic/1361223-mass-effect-3-ending-discussion-thread-3-spoilers/, just as a head's-up. If the gaming news sites are any indication, it's kind of a big deal, and I think it's going to be easier if we keep all discussion of the ending in that thread, going forward.

Anyway, I've just finished the game (my own thoughts on the ending are in the new thread.) Overall, I really did love the series though. I've already started a new playthrough in Mass Effect 1, with a different Shepard, to see what might play out differently.
Not everything in the series went as planned. I think with a game of this scope, the big problem as that it was always going to fall short of what we kind of hoped it was going to be (true for all three games, really.)
I do hope that Bioware continues with games like this, however. If not with another Mass Effect trilogy - then at least with another series of games that experiment with keeping tabs on a continuing character and the choices they've made.
I kind of see this whole thing as a big (and very risky) experiment on their part - to see what they could do with keeping one character through the series, importing save games, etc. Now that they've done it once, I do like to think that they might be able to do an even better job with another go, and the lessons they've (hopefully) learned.