Because you like Martin Brody in Jaws

Shrek is a nasty-on-the-surface ogre with a heart of gold and an earful of wax. See them in Shrek.

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.

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.

Percy Jackson is an ordinary student thrust into the world of myth come alive. See them in Percy Jackson & The Olympians: The Lightning Thief.

He tells you everything you need to know: "I. Am. Groot." See them in Marvel Cinematic Universe.

Not only will attorney Matt Murdock get you off the hook, but his alter ego Daredevil might also swing by later and rough up whoever put you there. See them in Marvel Cinematic Universe.

A superpowered test subject, Scarlet Witch can manipulate other people's thoughts and force them to confront their worst fears. See them in Marvel Cinematic Universe.

Tony Stark's interests include cocktails, beautiful women, particle physics, and saving the world. See them in Marvel Cinematic Universe.

The adventurous daughter of Port Royal's governor, Elizabeth Swann would rather conspire with pirates than sit pretty in her corset. See them in Pirates of the Caribbean: the Curse of the Black Pearl.

John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.

After surviving consecutive fights-to-the-death (damn you, President Snow!), Katniss Everdeen is thrust to the front lines of a real war. See them in The Hunger Games .

An escaped convict on a mission, Sirius Black is brooding, brave, and reckless. See them in Harry Potter Series.