Because you like Billy Costigan in The Departed

Free-spirited Annie Hall goes through life saying "La-di-da, la-di-da, la la." See them in Annie Hall.

Gilderoy Lockhart's biggest idol is himself. See them in Harry Potter Series.

An opinionated pothead with a passion for conspiracy theories, Steven Hyde is secretly more sensitive than he lets on. See them in That '70s Show.

Jason Bourne is suffering amnesia, but considering what he's done as a CIA assassin, maybe that's for the best. See them in The Bourne Identity.

Harrison Wells is a brilliant scientist full of secrets. See them in DC Extended Universe.

Aladdin is a street-thief who is on his way up. Way, way up! See them in Aladdin.

On the outside, Gwen seems meek and calm. But she has an inner core of steel. See them in Merlin.

Frank Reynolds is too gross even for the prostitutes he hires. See them in It's Always Sunny in Philadelphia .

Georgina Sparks uses beauty, brains, and power to always get her way. See them in Gossip Girl.

D.J. Tanner is a rebellious teen who wishes her lame dad would butt out of her personal life. See them in Full House.

Anastasia Steele's new boyfriend Christian might as well come with a warning label that reads "Beware: Severe Issues That Might Warrant a Trip to Dr. Phil." See them in Fifty Shades of Grey.

Though she has the normal insecurities of a 15-year-old, Aurora is both courageous and empathetic. See them in Maleficent.