Because you like Jack Torrance in The Shining
Mr. Blonde is the undisputed leader of his pack of suited-up outlaws, with a stoic and serious demeanor, and a penchant for bloodshed. See them in Reservoir Dogs.
Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.
Macbeth was probably named "Most Likely to Kill His Rivals" in his senior yearbook. See them in Macbeth.
Jean-Baptiste Grenouille may have a phenomenal sense of smell, but he has a weak sense of morality. See them in Perfume: The Story of a Murderer.
A champion of chivalry, Don Quixote is dutifully bringing good to the world—even when others think he's out of his mind. See them in Don Quixote.
A Vietnam vet, Travis Bickle spends his days driving his taxi and watching porn flicks. See them in Taxi Driver.
World domination and Superman's demise are next on Lex Luthor's to-do list. See them in DC Extended Universe.
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.
Clarice Starling is patiently working with one serial killer to stop another. See them in The Silence of the Lambs.
Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.