I'll start with this: David Lee Roth is intelligent and articulate. Unfortunately, that alone does not make for a good radio show. The David Lee Roth Show, for lack of a better word, is just awful. His comments are punctuated by musical snippets between sentences. There's no chemistry among the crew. No guests. The format is much like that of local afternoon drive-time radio - find one subject, and ram it into the ground. There's a right-wing feel to the commentary, as if he's trying to be a Ted Nugent Lite.
Maybe, like Conan O'Brien, Roth will hit his stride, and the show will eventually catch on. I'm betting it's not going to happen, though.
I bought a Sirius radio a year and a half ago. After hearing Roth a couple of mornings, I decided to buy about a hundred shares of Sirius stock.