Because you like Cory Matthews in Boy Meets World
Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.
Usually the life of the party, Laszlo is now seriously planning the vampiric takeover of the New World. Or at least Staten Island. See them in What We Do In The Shadows.
An underdog with nothing left to lose, Donnie Creed has everything to prove. See them in Creed.
Gollum is slimy and seething with hatred, the last person you would want to meet in a dark cave. See them in The Lord of the Rings.
After surviving a CIA mission that was supposed to kill him, ex-military man John Reese bets it all on a chance to redeem himself. See them in Person of Interest.
Francis Freeman may be impervious to pain, but he sure knows how to inflict it. See them in Deadpool.
Driven, resentful, and ruthless, Mello is an emotional powder keg. It's only a matter of time before he explodes. See them in Death Note.
A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.
A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.
Simba just can't wait to be king, but he's got a lot of growing up to do first. See them in The Lion King.
Will Herondale is an emotionally distant bad boy with a secret. See them in Clockwork Angel .
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.