My top three are probably a little weird.

1.Samus-my all time favorite nintendo character. I've used her and mastered her in all of the Super Smash.

2.Bowser- I love anyone that has huge power, and Bowser fits the bill very well. He isn't to slow and he has a good 360 attack that can keep him alive.

3.Snake- an awesome addition to the game that I hope will be brought back. He is the most balanced person in my opinion.