The roster is horrible!
with that out now, I guess the way it was revealed was its flaw, because characters like Pit or R.O.B are awesome (original!) additions, have their long history with Nintendo and mean something for Nintendo fans. All the "secret" characters were just returning from melee, so it lessened the impact, a different order in the reveal and a smaller initial roster would have been better.
Wolf was the worst, specially because he's the last one you unlock, and for that is terribly dissapointing. I don't mind clones, but not only is he the third in a series of clones, he's from the same series of games. Something like Ganondorf/Captain Falcon doesn't bother me so much because at least is a different franchise, and the final smash is different. You really expect something much better from the last unlocked character.
And samus is the new nintendo whore, my brother couldn't help but noticing her ridiculous proportions worth of something like Lara Croft, it was just sad.
My favorites are the very first newcomers revealed, Metaknight and Pit, but honestly I just like things that fly. I play with Olimar a lot too but is more from principle since pikmin is awesome, and not because he's an awesome fighter or anything. I had the best results with Lucas actually, but he's just boring to play with, so I don't care if I'm better with him I rather play with others.