The biggest turnoff for me on both sides is that they both say "I'm right, I have all the knowledge and so if you don't take my side you are an ass. I used to be a christian, very sure of my beliefs. But I always had an open mind, and I try and keep it that way. I know there are "truths" in all faiths, and I accept them when I see them. Even those on the Athiest and Agnostic sides. I guess what I mean is I don'thave the answers, nobody does. For years whenever my JW wife or father starts in on their JW are the true religion rants I just tell them that -Nobody has a monopoly on God. Man do they hate that.
As for the two Bills - they are both very arrogant and pompus. I like O'Reily for the most part as I see him argue his point well and he often plays the devils advocate which is why his show is so popular. Mr. Maher is a really funny, and he always has that twinkle in his eye that says "somethings coming. But I don't like the "angry comic" rutine from him or any other comic.