Millard
The painfully obvious setups that the hosts give to standups when they're on their shows makes these kinds of things hard to watch for me. It's less a conversation than it is some kind of verbal tennis. "So, you travel a lot, how do you find time to get intimate with your wife?", etc.

citrusmirakel
For shorter routines, I've always preferred the host giving set-up lines than an actual six minutes of stand-up, but there's a really delicate balance in there that only certain people could achieve. It's the place Letterman's always excelled, and it's always been a weakness of Conan's because his default position is "LOOGIT MEE!", which is good when guests suck, but anticedant to the egomaniacal psychopaths that stand-up comedians typically are.

Also, I thought Posehn's routine was shitty.

Big Muddy
Anticedant to the egomanical psychopaths huh?
You must really like comedy!
Letterman's game is played out man. This is just about the only thing I still watch anymore, and for good reason. Posehn always ruminates about the same shit just before he blows most of his jokes, but he's usually not that bad.