I think there are three types of actors. There are the ones that do the ego thing, which is "I'm never going to look bad in a movie, ever." This is mostly the action film dudes, like, "Nah, hell no. He ain't punchin' me! I'd whoop his ass!"
The egos in this industry are incredibly vulnerable and everybody's afraid to wipe out. So everybody plays it safe and everybody tells everybody else how great they are.