chess4: Dragon is ugly as hell. Luffy and Garp aren't exactly Bishis, but Garp looks strong and manly, and I guess Luffy's good looking, even though he looks like a kid.
beastboy: I agree, I think Hancock is very strong, and I think Oda mislead us with Croc and Moria into underestimating the level of the Shichibukai. Mihawk is in the top tier, since he's the strongest swordsmen and as far as we know he's like Zoro and gets his strength only from swordsmanship. Jinbei (I know, he's not one anymore) was equal to Ace, and is probably stronger now than he was back then. Blackbeard is one of the strongest seen so far. Kuma is ridiculously strong, he's (nearly) indestructable, shoots lasers, can teleport instantly and deals big damage. I have a lot to say about Doflamingo, which I'll save for a later post, but he scares me the most. Croc isn't weak, he's one of the most skilled devil fruit users revealed so far in that he's mastered his use of his fruit to a very high level. Moria I just don't like, but I can't really call him weak. What I'm trying to say is, because Luffy beat two of them, I thought they were overrated, but damn, they really are at the top too.
Smoker: I think if he gets promoted (I don't see why he would, he hasn't done anything great yet, he let Luffy get away, no excuse just because hancock got involved, the marines won't care), I think it'll be to rear admiral, not vice admiral. He's good, but maybe not that good yet. When the war started I thought Luffy was vice admiral level, but I dunno. Maybe he is, it's hard to say since he never fought one before.
Enel: I also think he'll make a return. Shichibukai? Doubt it, he wants to rule all and wouldn't pledge fealty to the marines. I'd love to see him become a pirate, have his bounty skyrocket by beating strong new world pirates, run into the Straw Hats and get owned. He may be better prepared now but still, Luffy also got stronger. It would make Luffy's rep shoot through the roof, even with those who understand that Luffy's ability gave him the edge.
I don't think Kuma was a Revolutionary, but I think he was friends with them, or at least with Iva. Plus, when he was introduced they said he was the shichibukai most loyal to the WG, plus now he's a complete pacifista. Makes me think the WG or Vegapunk had something they could use to make him obey them, like threatening someone or something dear to him.
Gorosei - I also wanna know more about them. One of them had a huge sword with the same guard and hilt as the Kitetsu swords, and when I first noticed this I suspected it may be Shodai Kitetsu. It's possible, since such a powerful and influential man could easily get a hold of something so rare and valuable.
Dadan intrigues me the most!!! I wanted more flashbacks so we could see him/her.
Kaidou I can wait for.
I suspect one of the remaining too Yonkou is Lola's mom (I know someone already said this, just throwing it in there coz I thought so too, and Kaidou reminded me).