Because you like Christopher John Francis Boone in The Curious Incident of the Dog in the Night-Time
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.
Driven yet empathetic, Emily Prentiss brings humanity to the pursuit of inhuman killers. See them in Criminal Minds.
A super-soldier, Master Chief might be more machine than man. And for humanity's sake, thank God. See them in Halo.
A former high school outcast, Rebecca Doppelmeyer is tentatively shaking off her misanthropic personality. See them in Ghost World.
A gifted detective, Rust Cohle is as dark and twisty as any murderer he chases. See them in True Detective Season 1.
A wildly brilliant detective, Sherlock Holmes can figure out everything except how to interact with other human beings. See them in Sherlock.
Lloyd Dobler is a kickboxer wearing his heart on his sleeve who would do anything for the woman he loves. See them in Say Anything.
Underneath his preening narcissist exterior, Schmidt is, well, still kind of a preening narcissist. But he has a good heart too. See them in New Girl.