Because you like George Smiley in Tinker Tailor Soldier Spy
Romantic, tortured, and at times cruel, Heathcliff is an intense man. See them in Wuthering Heights.
The black sheep of his family, Rhett Butler grew up to have charm and to see things as they are. He just doesn't give a damn anymore. See them in Gone with the Wind.
A few millennia in the mortal realm have caused DEATH to be quite enamored of life. See them in Discworld.
Hans Landa doesn't seem to have issues with Jews, but he hunts them because he's determined to do his job well. See them in Inglourious Basterds.
Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.
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.
Major Marquis Warren is a talkative, sharp-eyed, and cold-hearted Civil War soldier-turned-bounty hunter. See them in The Hateful Eight.
Meticulous Arthur is always prepared, but he may not be ready to be the point man in the criminal world of dream sharing. See them in Inception.
Miss Havisham is the creepiest old rich lady in town. See them in Great Expectations.
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.