We watch movies to be entertained and shocked, to be excited and compelled by seeing something or someone we probably wouldn't in the real world. There is surely no more entertaining character type throughout film history than that of the psychopath. Those lovable (but flawed) guys and girls who are hell bent on revenge, murder and general chaos can really make a good movie great. After all, it's nice to see the good guys, comedians, cops and lovers, but that can all get a little bit... Vanilla. It's also important to acknowledge that psychopaths aren't exclusive to the horror and thriller genres - not that we're doubting you knowledgeable readers. Some of the zestiest dudes of all time have popped up in gangster movies, dramas and black comedy (Tyler Durden, anyone?), in addition to the vast number of oddballs residing in more obvious genres. If psychopaths didn't pop up in those unexpected places though, the film industry would be utterly dull and boring. Historically, the role of psychopath has drawn some of the biggest names in the business: Jack Nicholson, Anthony Hopkins and Michael Douglas to name but a few. These roles are also some of the most rewarding for actors and actresses, as they are often given free rein to leave their own mark on wildly extravagant characters. With all of this in mind, here are 10 of the strangest, scariest and funniest psychos from popular film.