Because you like Holden Ford in Mindhunter
Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.
A natural leader, Clarke Griffin dispenses both justice and mercy, and she does it all while being selflessly humble. See them in The 100.
Jack Frost would rather crack a joke or throw a snowball than take anything seriously. See them in Rise of the Guardians.
Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.
Alison DiLaurentis believes you're always better off with a really good lie. See them in Pretty Little Liars.
Puss In Boots is a suave, honorable ladies man/cat who's not above playing cute to get you to let down your guard. See them in Shrek 2.
Damon Salvatore used to miss being human. Now he can't think of anything more miserable. See them in The Vampire Diaries.
An aloof punk rock goddess, Nana Osaki has a surprisingly big heart. See them in Nana.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.