Letterman is god in the late night world...
Ferguson is good too...
i like Conan, but he makes the whole show about him, look at me I am conan type of thing, attention whore, plain and simple...
Letterman was to replace johnny (that is what johnny wanted) but they went with leno (nobody knows why), and lets not forget he owns a couple of race cars
and has Danica Patrick's home number