I used to enjoy MetaFilter. It was a place where you could see some truly offbeat and interesting stuff -- kind of like MemePool, only even more esoteric. But ever since George W. Bush became president, the site might as well be called IHateBushFilter, and the tenor of the discussion has turned shrill enough to drive away even fans of The Nation.
(When did the Left become so shrill and humorless, by the way? Even Al Franken can't seem to crack a decent political joke anymore; he's just as bitter and pissy as the rest of them.)