Because you like Eric Forman in That '70s Show

Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.

Faced with inequality, Gale Hawthorne has a rebellious spirit that only grows. See them in The Hunger Games .

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.

Hiccup Haddock III may be the only Viking nerd in recorded history. See them in How to Train Your Dragon.

A natural leader, Clarke Griffin dispenses both justice and mercy, and she does it all while being selflessly humble. See them in The 100.

Margo loves mysteries so much that she becomes one. See them in Paper Towns.

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.

This ice queen is learning to let it go. See them in Frozen.

Mike Lane is magnetic, beefy, and street-smart, but how long can he keep up with the red-light scene? See them in Magic Mike.

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

Stuck somewhere between life and death, Talion is motivated by one thing only: vengeance. See them in Middle-earth: Shadow of Mordor.

Bedside manner is for chumps, not the brilliant Dr. Gregory House. See them in House M.D..