Because you like Amon Goeth in Schindler's List
Beware! Anton Chigurh carries a coin with him, which he forces his victims to flip to decide whether they will live or die. See them in No Country for Old Men.
Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.
Hotheaded and arrogant, Kaneda is nevertheless fiercely protective of the biker gang he leads. See them in Akira.
Clarice Starling is patiently working with one serial killer to stop another. See them in The Silence of the Lambs.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
Rogue's touch is literally deadly, and she's trying to learn from the older mutants how to manager her powers. See them in X-Men Series.
Aimee Finecky has big dreams, but she's too busy taking care of everyone else's desires. See them in The Spectacular Now.
Arwen has to choose between a life of loneliness or love and inevitible death, both rather unfortunate options. See them in The Lord of the Rings.
Shuri is a genius-level inventor with a wicked sense of humor. See them in Marvel Cinematic Universe.
One of the best in the magical world, Mad-Eye has the battle scars to prove his dedication to such a dangerous job. See them in Harry Potter Series.
Driven and straightforward with high-technology parts, EVE was sent to Earth to see if it is habitable. See them in WALL-E.
Frodo might have carried the ring, but Samwise Gamgee carried the ring bearer. See them in The Lord of the Rings.