King of the Hill is perhaps my favorite show of all time. It may not be as flashy or outrageous as say Family Guy, but that niche is filled nicely and KOTH does an amazing job within the confines of realism. I've heard people complaining that it is slow and boring, but that's because people are numbed by the surreal world of the Simpsons and Family Guy.
The characters are definitely what makes KOTH so special. They are each so incredibly lovable in there own ways. Peggy's narcissism, the way she says "Peggy Hill." Bill's defeated loyalty. Dale's... paranoia. I love them all and am very sad to see them go, despite its quality slipping towards the end. And I am especially sad that Hulu doesn't carry any of the episodes. I blame Fox . They're so cheap, It's not surprising.