Because you like Robert Chase in House M.D.

Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.

The witty Aku would be an ideal dinner guest, if he weren't a demon. See them in Samurai Jack.

Humble, caring, and protective, Scott McCall tries to make the best of his newfound status as a werewolf. See them in Teen Wolf.

A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.

Phoebe Halliwell is a bestselling author and martial arts master with power of premonitions. See them in Charmed.

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

Driven yet empathetic, Emily Prentiss brings humanity to the pursuit of inhuman killers. See them in Criminal Minds.

Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.

Will Turner is an earnest, lovelorn blacksmith's assistant with an adventurous spirit. See them in Pirates of the Caribbean: the Curse of the Black Pearl.

People make more sense to the hyper-logical Temperance Brennan after they're dead. See them in Bones.

Derek Shepherd is a talented and passionate neurosurgeon. Some people call him McDreamy. See them in Grey's Anatomy.

Polite and clever, Annie James is not afraid to stir up a little mischief. See them in The Parent Trap.