I've been watching night time talk shows since I was a kid staying up late to watch Johnny Carson! There was just something forbidden and alluring about watching those late-night shows.
Nowadays its hard to tell them apart. You have the old guard--Leno/LettermanArsinio and not so young anymore upstarts--Conan/Jimmy Fallon/Jimmy Kimmel and they all comment on the same news items and celeb gossip. Jimmy Kimmel comes up with interesting things every so often and Conan has some crazy funny stuff every now and then--but they usually put me to sleep!
I liked Leno until that ruckus with Conan and he took his show back from the successor! I had never seen that happen before, didnt think it was possible! It really made Jay look like a small child who grabbed his toy back. And now he is 'leaving' again in Feb. We'll see.