Anecdotally, when Mike Judge's animated sitcom "King of the Hill" debuted in 1997, many said it couldn't possibly last. Judge's previous animated project "Beavis and Butt-Head," many felt, was able to achieve a certain degree of cultural traction thanks to its ability to tap into a specific brand of MTV-inflected Gen-X self-mockery. In comparison, all "King of the Hill" had going for it was a gentle and affectionate ribbing of Texans. Those anecdotal naysayers were proven wrong, however, as...