Because you like M in Casino Royale
Chaos is what killed the dinosaurs, and there's nothing Jason "J.D." Dean loves more than chaos. See them in Heathers.
Will Byers is just like any other twelve year old, except he's stuck in another dimension. See them in Stranger Things.
Amy Santiago likes following the rules a little too much. See them in Brooklyn Nine-Nine.
Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.
Her unhappy childhood has left her unsure of the existence of happy endings. Mary Jane Watson hides her pain beneath a joke and a smile. See them in Marvel Cinematic Universe.
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.
Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.
Albus Dumbledore oversees the most unsafe school in recorded history, with Dementors and giant arachnids run amok. See them in Harry Potter Series.
Christian Grey is just as controlling in the bedroom as the boardroom. See them in Fifty Shades of Grey.
Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.