7. Richie Gecko (Quentin Tarantino) - From Dusk Till Dawn
When hes not fantasising about a Ministers teenage daughter or slaughtering a female hostage for no better reason than because he can, Richie Gecko is a dab hand at making a bad situation worse, either by indiscriminately shooting people or telling lies to his brother Seth (George Clooney). One such lie results in a shootout at Bennys World Of Liquor (If we dont got it, you dont want it!) when Richie accuses the clerk of signalling the Sheriff, so he decides to execute them both and blow up the store for good measure. Better safe than sorry, you know. The kind of bank robber (and sex offender) who was kicked out of Reservoir Dogs for being too unpredictable, Richie has killed five people before were even introduced to him, collateral damage resulting from breaking Seth out of custody. He also grinds his teeth.