Because you like Henry Higgins in My Fair Lady

She's mostly doom and gloom, but you'd get nowhere without Sadness. See them in Inside Out.

Regina George is teen royalty. And anything the queen bee says, goes. See them in Mean Girls.

Jack Frost would rather crack a joke or throw a snowball than take anything seriously. See them in Rise of the Guardians.

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

Billionaire playboy by day and vigilante archer by night, Oliver Queen aims to rid Starling City of crime and atone for his past mistakes. See them in DC Extended Universe.

Socialite-turned-runaway-turned-waitress, Rachel Green is the legendary story of riches to rags, trying to work her way up again with the help of her friends. See them in Friends.

Whether she's working as a mild-mannered assistant or an all-powerful superhero, Kara Danvers is defined above all by her huge heart. See them in Supergirl.

Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.

A dreamy space cadet, Luna Lovegood has never met a conspiracy theory she didn't believe in. See them in Harry Potter Series.

With the ocean breeze behind him and the open seas ahead of him, Jack Dawson feels as if he is king of the world. See them in Titanic.

With his own ship, Peter Quill calls his own shots, and gets to fly from planet to planet blasting '70s pop hits and picking up alien chicks. See them in Marvel Cinematic Universe.

He tells you everything you need to know: "I. Am. Groot." See them in Marvel Cinematic Universe.