Because you like William Somerset in Se7en

Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.

Belle has ready every storybook in town, and she's slowly realizing that life is no fairytale. See them in Beauty and the Beast.

Hell hath no fury like an evil fairy scorned. See them in Maleficent.

What Ron Weasley lacks in motivation and book smarts, he makes up for in loyalty and street smarts. See them in Harry Potter Series.

He's an eccentric pirate making it up as he goes along. He's Jack Sparrow, savvy? See them in Pirates of the Caribbean: the Curse of the Black Pearl.

A wildly brilliant detective, Sherlock Holmes can figure out everything except how to interact with other human beings. See them in Sherlock.