Because you like Amy Farrah Fowler in The Big Bang Theory

Elena Gilbert is the quintessential girl-next-door who gets involved with the new "boy" at school. See them in The Vampire Diaries.

After having his mind altered after a bad breakup, Joel Barish is not convinced that ignorance is bliss. See them in Eternal Sunshine of the Spotless Mind.

Joe Goldberg works at a local bookstore and charms most girls sock's off. He is also a serial killer, but no one is perfect! See them in You.

You wouldn't know it by looking at her, but beneath Sheila Jackson's sweet, motherly exterior lies a sex addict. See them in Shameless.

Zeratul is cryptic, mystic, and not to be messed with. See them in StarCraft .

Mr. Pink doesn't tip. Enough said. See them in Reservoir Dogs.

Sensual, wild, and with a penchant for controlled substances, Lily is a ballet dancer who isn't afraid to let loose. See them in Black Swan.

Tom Hansen is a full-fledged romantic impatiently waiting for his love story. See them in (500) Days of Summer.

Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.

Jean-Baptiste Grenouille may have a phenomenal sense of smell, but he has a weak sense of morality. See them in Perfume: The Story of a Murderer.

Prideful and psychotic tendencies combine to make Dr. Eggman a dangerous and villain who will squash anyone in his path. See them in Sonic the Hedgehog.

Needles Kane says shut up and bleed. See them in Twisted Metal .