The one I definitely dislike the most is Apoo. And I disliked him since his very first appearance. Can't explain it...he looks like a rat.
I actually like Hawkins. His ability is cool and he knows how to use it.
Bege is badass, he definitely should quit piracy and focus on being mafia.
My favourites though, are Zoro, Bonney and Law (Not counting Luffy, obviously)