Jack Black is particularly annoying. Tries to be John Belushi and fails miserably.
Jury is still out on Steve Carrell. I thought the 40-year-old Virgin was one of the funnier movies I've seen in awhile (bar is set pretty low, though). The Chest-Waxing scene was fall-out-of-my-seat-funny, IMHO.
Jack Black is the same character in every movie. I just can’t stand him.