Azzy
ᚳᚣᚾᛖᚹᚢᛚᚠ
Being someone that loves history, I love the fact that Greyhawk has an organic history (complete with migrations and ancient civilizations) that inform, but don't overwhelm the setting. I love that there are multiple human ethnicities that are tied to the history (rather than being an afterthought). I love that the present of the setting (regardless of which you choose—original folio/boxed set, FtA, or the Adventure Begins/LGG) that the setting has kingdoms and empires in decline, large amounts of untamed wilderness, the threat of evil and tyranny, the threat of looming conflicts even as old ones fade away. I love all the adventure hooks.