letterman seems the most laid back. doesn't try to hard and when he does it's sort of slight of hand. so he's good. kimmel's the funniest between the three of them. leno is a nightmare of a human being.
Most important to advancing Late Night Shows:
Best at their job:
1. Leno (you all know that stuff)
2. Fallon (dick to other comedians and suck up)
3. Letterman (rude but wants to be left alone)
I don't really like any of them, Letterman if I had to pick. I don't even like Ferguson anymore, he's gone too dumb and reliant on gimmicks. He used to do it ironically but now he's just uncreative and boring.