American Psycho is excellent though, if someone walks out of that film thinking Bateman is a cool guy then there's probably not much hope for them
I always say that the mistake filmmakers make is that they don't want to make their character truly cringe. You've got to have the Fight Club guy go into his room and the walls are covered with underage anime characters and he wanks himself to sleep while clutching a body pillow and dirty talking to it.