I am buying books I think will interest me. The "Complete ..." series does not interest me, being full of crunch I don't use in my 3E campaign (judging from the "complete Warrior" whoich I own, and from reviews. The same goes for the races books, and some of the location books - I hate arctic stuff, but I preordered Sandstorm.
3rd party publishers, I'd like more from Kenzer, but I am not interested in elves or orcs or hopgoblins, so I will have to wait for other stuff.
Forgotten Realms I'll probably buy, since I can usually use stuff from there, playing and DMing 2 FR campaigns.
But I am really, really sick of yet another bunch of feats, prestige classes, core classes, spells or races.