It's funny, recently MvC3 isn't getting as much hate as before now, for two reasons:
1) A lot of people are actually finding the game to be hype as fuck now, and it's really fun to watch due to its fast-paced action and combos in the game are actually being expanded every day, so you usually see really nice plays every time.
2) With SFxT out, all the Crapcom haters have moved onto that game :V
Now, the game definitely isn't the best, due to it's REALLY beginner friendly gameplay (I think a little TOO beginner friendly), it's terrible x-factor comeback mechanic/system, and horrible balancing issues (ie. Wesker), though honestly, it's a bit more balanced that lolvanilla and loldarkphoenix.
But Skullgirls IMO looks like got that game beat. I'll probably pick this up, after seeing what others feel about the game (what I did with Marvel and other fighters, except Melty, never really thought about getting it but Suikama gave it to me anyways so :V). I love the customization for assists.