Dragonhelm
Knight of Solamnia
There's anything besides Dragonlance? 
(Thought you'd get a kick out of that, Kai Lord. lol)
Dragonlance was a gaming world before it was a novel world. It's just that the novels have been more successful than the gaming side has, although I'd say that Sovereign Press has done extremely well since they got the license. Of course, I'm biased.
Seriously, though, Dragonlance is my #1 choice for a fluff-filled campaign setting. There's lots of depth to the characters, and many of the races are far from generic. Themes such as the Balance are a bit refreshing when you first get into DL. Most fantasy stories end up with good defeating evil. Dragonlance ends with them being on even grounds, and neither side truly winning or losing.
Another one I really like is Legend of the Five Rings. This is a highly role-playing based setting, and one that will throw you at first since honor and saving face often come in as more important than doing the right thing. It's got good flavor, and I love the magic system.
I liked Dark Sun's flavor as well, although I didn't get to play it much.
Spelljammer was a fun setting, and one that has a lot of potential. I think it needs to be a setting in and of itself, rather than one that ties other settings together. It should still have that potential (although not necessary). However, I don't think that should be the focus.

(Thought you'd get a kick out of that, Kai Lord. lol)
Khayman said:* Dragonlance, as it stems from a series of novels, was fairly consistent and self-contained.
Dragonlance was a gaming world before it was a novel world. It's just that the novels have been more successful than the gaming side has, although I'd say that Sovereign Press has done extremely well since they got the license. Of course, I'm biased.

Seriously, though, Dragonlance is my #1 choice for a fluff-filled campaign setting. There's lots of depth to the characters, and many of the races are far from generic. Themes such as the Balance are a bit refreshing when you first get into DL. Most fantasy stories end up with good defeating evil. Dragonlance ends with them being on even grounds, and neither side truly winning or losing.
Another one I really like is Legend of the Five Rings. This is a highly role-playing based setting, and one that will throw you at first since honor and saving face often come in as more important than doing the right thing. It's got good flavor, and I love the magic system.
I liked Dark Sun's flavor as well, although I didn't get to play it much.
Spelljammer was a fun setting, and one that has a lot of potential. I think it needs to be a setting in and of itself, rather than one that ties other settings together. It should still have that potential (although not necessary). However, I don't think that should be the focus.