I picked Yuffie...
well yu would too if yu bore witness to how great i have made her.
her attack, her morph, her magic does 9999 damage without fail. All stats are 255, i've used yuffie more than any other tradable character.
Even her casting chocobuckle does roughly 3000 on average...
her limit breaks are more varied and versatile.
why am i the only to vote for her...
noone else holds a candle to her.

.....
oh and for non playable characters...REEVE!!.
if squaresoft ever continued the story they have to have Reeve as the main character.Wanna hear my perfect storyline for that??...just ask.