I can't say that i have a favorite. I love all comedians if they make me laugh, but here are some off the top of my head:
Chris Rock
Lisa Lampanelli (ooooh, she's a nasty girl)
The guy known for the cuss words you can't say on t.v. (can't ever remember his name)
Dane Cook
Sam Kinison (rip)
Seinfeld
Ellen
Elaine Boozler
Jim Carey
Bill Cosby
Whoopie
Eddie Murphy
Steven Wright
Richard Pryor
I could watch tv all day if it was all stand-up comedy.
Ellen DeGeneres!!!! I actually went to high school with her. She's a year younger than myself. Everyone knew her, but she didn't know me. She was exactly the same in high school.