Heh, nothing against him, but me and my husband (We're 33 and 34) prefer Craig Ferguson ... but typically... we only watch late night tv when we're done catching up on DVRd shows from earlier and they flip off and by default Leno/Letterman/Craig/Conan comes on and then we watch it for a bit. I don't understand watching them on purpose. There's no plot!
They're funny and all.
We caught Leno for the first show, I commented: Hey, he's pretty funny, we should watch this again. Then, we never saw another episode because in our minds: Watch one, you've seen them all.
There are better things on (and we were a bit ticked off that they canceled Southland.)