I would offer to design one, but (1) they probably wouldn't let me and (2) I smurfing hate vBulletin 4's style editor.
I use Old Skool but this thread has inspired me to take a long look at some of the other styles. I doubt I'll switch permanently, though. I like the blue colours. I find them calming.
edit: ok, Kupo! is pretty cool. I might leave that one for awhile. I would like Sasquatch a lot more if it weren't a dark on light style set. Ew.
Also I wish my font showed up better in Under the Sea