Because you like Carmilla in Carmilla

L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.

A daring conman, Flynn Rider is so charismatic that you might not mind when he steals from you. See them in Tangled.

With great power comes great responsibility, but Peter Parker always seems to get the short end of that bargain. See them in Marvel Cinematic Universe.

Severus Snape is a misanthropic potions teacher with a vindictive streak. 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.