I am assuming you are referring to Dave Letterman? I love him. His 30th Anniverysary Show Top Ten List was hilarious!

As for Joan Rivers--She is funny. I was surprised by how raunchy she was. I enjoyed her documentary. (I think it was called A Piece of Work)

oh and of course Sheldon from Big Bang Theory makes me laugh out loud. He is just as cute as can be. that little moonpie.