I’m a Dave man to the core so I never watched Leno, but I didn’t have a particular animus against him. I did find him faintly annoying, though. Atrios:
Leno’s an asshole because too much of his comedy involves punching down. Ratings demonstrate lots of people like that, but I didn’t. Glad he’s outta there.
More and more, I’m inclined to group everyone I encounter, whether on teevee screen or on the internets or IRL, into people who punch down or people who punch up. There’s a surprising (or maybe it’s not so surprising) number of people who say they’re on the left and who vote do Democrat but who punch down with a vengeance. My impression is that almost everyone on the right is all about punching down.
Anyway, that’s probably the real divide (not in terms of voting but in terms of basic outlook), punching down versus punching up.