The answer is:

One of the highlights I had growing up as a young robot was staying up late to watch the Tonight show. Back when the host did fun sketches such as Karnak the Great (not this Karnak) and Floyd R. Turbo, American.

Sadly, Johnny Carson's shoes shall never be filled, particularly now that he's gone. The reports say emphysema, which given his history of smoking, is sadly not that surprising. Of course, most people think of Leno as the host of the Tonight Show, which is a damn shame. It used to be worth watching.