Who is (or was) your favorite late night talk show host?

I was lucky to catch Johnny Carson before he retired, I liked him, but didn't love him. I enjoy Conan O'Brien, he's the only one I can tolerate.

I'd say Conan was a good replacement for Carson. Even though no one can replace Carson, obviously. He was a man of his time. I also think Joan Rivers did great with her stint as a late night host as well.