Because you like Rose Tyler in Doctor Who

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.

Derek Morgan is thoughtful and kind, but he won't say no to knocking the occasional door down when he gets the chance. See them in Criminal Minds.

Call her. Beep her. If anyone's in trouble, Kim Possible is there. See them in Kim Possible.

Chuckie Finster is a baby afraid of everything from clowns to closets, unless his best friend's by his side. See them in Rugrats.

Nick Carraway is the perfect observer: always there for the events, but never too involved. See them in The Great Gatsby.

Michael Moscovitz is a high school student of few words but a lot of heart. See them in The Princess Diaries.

This elf loves smiling, eating sugar, and spreading Christmas cheer. And no matter what, Buddy always sees the best in people. See them in Elf.

A powerful priestess, Melisandre is shrouded in mystery and lots of red. See them in Game of Thrones.

Shy and nerdy, Gabriella Montez moved to Albuquerque and quickly became the toast of East High and a darling of the stage. See them in High School Musical.

Marlin navigates through shark-infested waters, angry anglerfish, a jellyfish bloom and hungry whales to search for his son. See them in Finding Nemo.

A bumbling hobbit, Bilbo Baggins is becoming a part of something much larger than himself as he embarks on a quest. See them in The Hobbit: An Unexpected Journey.

Ryan Howard is a temp turned executive turned failing small-time media mogul. See them in The Office.