I like them all almost equally.
Vegeta: He was one of the first bad ass villains period, and also one of the first bad ass heroes.
Goku: He's hilarious... 'nough said
Gohan: Kind hearted boy who was trained to fight like a demon (Demon's Flash for the win)
Piccolo: Pretty damn bad ass
Tienshinhan: Can't say much I didn't watch Dragon Ball through yet.
Yamucha: He's one of the characters I put pretty low on the list of likes. He's just a blah character (Was different in Dragon Ball though).
Krillin: Got to the Namek saga in Kai and got a new found appreciation for Krillin. He's pretty reliable for such a weak guy.
Frieza: Pretty damn evil, liked his voice actor in Japan.
Cell: Same as Frieza, has the best fight in the anime against Goku (They just couldn't get fighting right again after that).
Boo: All of them, I'm impressed with what Toriyama managed to make with Boo. He was different from the villains before him, but each Boo had a different flair to them.
Bulma: Hotness
Videl: Cute... and hotness
Chi Chi: They overplayed her protectiveness in the anime too much with filler. Gets annoying since that's all the filler writers would resort to.
Trunks: Was cool
Little Trunks: Hilarious. Still, the scene when Trunks was in tears because Vegeta got too beat up. It moved me.
Goten: As funny as kid Goku
