I've always liked
Colbert. Taking myself too seriously has never been among my otherwise multitudinous shortcomings. Otherwise I couldn't deal with some of the jokers around here at all. Thus, I've always enjoyed Colbert's skewering of his mindless conservative strawman. The strawman certainly isn't real, so what's the harm?
More to the point, Colbert has actual talent. His interviews display a mind that plays chess three moves ahead of the victim, throwing out delightful inversions all over the place.
I think he'll surprise a lot of people on Letterman. I may even try to TiVo an episode, and even watch a couple of minutes.