I liked Mass Effect 3, I enjoy playing it, and no other game (or any other form of art) had the same sort of emotional effect on me as the time I shot Mordin.
But the game still has some pretty bad design decisions. The side missions sucked. The reduced dialogue options sucked. Overriding player choices from the previous games (Rachni Queen, Udina on Council, etc) with the wave of a hand sucked. The ending was atrocious. The Omega DLC was completely pointless, and far too expensive.
It wasn't a bad game, it was pretty good overall, but at the same time it wasn't the send-off that the trilogy deserved.