Because you like Gary the Snail in SpongeBob SquarePants

Abandoned by her parents, Rey made her living selling scrap metal and got used to being her own friend and teacher. See them in Star Wars Series.

John Tyree has survived heavy gunfire and aggressive enemy soldiers. But can he handle a girl? See them in Dear John.

A resourceful ship systems engineer, Isaac Clarke does his best to batttle the infection spreading across space. See them in Dead Space.

With a brilliant mind, an insane level of confidence, and a penchant for drunken dancing, Cristina Yang is a force to be reckoned with. See them in Grey's Anatomy.

In charge of stocking the office's supply of cigarettes and liquor, Joan Holloway could run the whole company if they would let her. See them in Mad Men.

Steve Stifler is more than just a dude with a hot mom. He's also rude, profane, and obnoxious. See them in American Pie.

Gruff and sarcastic, Detective Harry Dresden use unconventional ways to track down perps, including using magic and the supernatural. See them in The Dresden Files.

Raiden is an efficient soldier haunted by his repressed past. See them in Metal Gear Series.

Princess-turned-General Leia Organa is a sharp, fearless royal who gets herself into trouble and fights her way out of it. See them in Star Wars Series.

Stranded on Mars, Mark Watney is armed with quick wits, an electronic diary, disco music, and an undying resolve to make it back. See them in The Martian.