Because you like Lorraine Warren in The Conjuring
Steven Universe is an excitable youth who likes junk food and trying to save the world. See them in Steven Universe.
Stranded on Mars, Mark Watney is armed with quick wits, an electronic diary, disco music, and an undying resolve to make it back. See them in The Martian.
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.
Teddy Sanders loves his frat brothers so much he might never leave school. See them in Neighbors.
Bedside manner is for chumps, not the brilliant Dr. Gregory House. See them in House M.D..
A wildly brilliant detective, Sherlock Holmes can figure out everything except how to interact with other human beings. See them in Sherlock.
Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.
When the going gets tough, Rick Grimes gets tougher. It's a very useful trait when the world goes to hell. See them in The Walking Dead.
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 speed-loving daredevil who lives on the edge, Sonic is as brave as he is cocky. See them in Sonic the Hedgehog.
Megamind is searching for purpose in a supervillain life without a superhero to fight. See them in Megamind.