Word. If only they had put even 1/10th as much into the ending as they did with the resolution of the Geth/Quarian conflict (in as general terms as possible to avoid spoilers), it would have been awesome.
I still think Mass Effect 3 was a great game. But the ending was also the ending to an entire trilogy. By screwing that up, they kind of soured my feeling on the whole series up to that point. I still love the characters, and the world in general, but that story left a bad taste in a lot of people's mouths because of the ending.