Because you like Leonard "Bones" McCoy in Star Trek

A suave manipulator, Sebastian Valmont is valiantly fighting off a developing conscience. See them in Cruel Intentions.

Carl Fredricksen is a crotchety old man who may just have it in him to take one last, great adventure. See them in Up.

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

Don't worry about this forensic scientist offing you unless you're a serial killer yourself. (You're not, right? Just checking.) See them in Dexter.

Motivated by a strong sense of curiosity, fleet-footed Lina Mayfleet is happiest when she's on the move. See them in The City of Ember.

Though cynical about the world, Shuya Nanahara is caring and protective towards his friends. See them in Battle Royale.

If you need her, Lisa Simpson will be in her room with her saxophone and a good book. See them in The Simpsons.

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

Ponyboy Curtis is a "Greaser" on the surface, but he's a sensitive poet underneath. See them in The Outsiders.

Once a loving family man, James Heller is now dark, damaged, and hell-bent on getting revenge. See them in Prototype Series.

Stanley Barber is a loveable goofball with impeccable (if eccentric) fashion sense, unique music taste, and a wealth of strange but useful knowledge. See them in I Am Not Okay With This.

Meat Boy tenaciously throws himself into danger, and when he fails, he immediately gets back up and tries again. See them in Super Meat Boy.