The rule of thumb for a director or producer - which prevents them from just sticking their names on everything - is that you have to contribute substantially more than 50 percent of the character dialogue and story.
Harold RamisComedy is essentially made by young men, or older men with some form of arrested development, for young men or immature older men.
Harold RamisFor me, most comedy scripts fail in the mechanical playing-out of the setup. They'll pay lip service to a moral lesson or a psychological progression.
Harold RamisIf Chevy Chase had not been an actor, he might have been a very popular guy in advertising or whatever field he would have gone into, because of his charisma.
Harold Ramis