I can't vote apparently, but it's a hard choice.
Probably:
1. Crocodile (for being generally awesome and creepy)
2. Jimbei (for being an awesome stand-up guy)
3. Kuma (for having the coolest DF power and being an enigma…pre-Marineford at least)
4. Mihawk (scary awesome)
5. Teach (Looks too goofy, but I love everything else)
6. Boa (SHE KICKED A KITTEN.)
7. Doflamingo (I don't like what he did to Oars Jr., plus he's kind of a jerk)
8. Moria (love his power, hate everything else)