^^ admins we've got an advertiser here.
my one piece favorite characters are:
Vergo: i like how he was able to combine Weapon Fighting, Haki and Rokushiki (the very own techniques his enemies use) to form his own fighting style consisting of hard hitting kicks and punches, shigan stabs and a bambo staff that he gets out whenever things get serious. it's a shame he he won't show up again as im very interested in seeing him display more of his skills.
Akainu: unbreakable force of will, he wanted ace and luffy dead and didn't want to stop until he kills them and he almost succeeds. he did the most damage to the pirates in the marineford battle. killed ace, injured WB to near death, and scarred luffy (in an attempt to go for his heart). plus he's got some kick ass lava powers and a weird invulnerability to haki attacks.
Rosinante: the most selfless character in the series. he wants to stop his brother from hurting people. helped a dying boy get a very rare devil fruit just to save his life and he refused to shoot his brother when the latter didn't mind about that.