Because you like Kirk Lazarus in Tropic Thunder

The ever-cheerful Tonks can change her appearance at will, but she can't seem to get rid of her clumsiness. See them in Harry Potter Series.

Morticia Addams hates anything bright and cheery and loves all things ghoulish, ghastly, and violent. See them in The Addams Family.

Unaware of the fact that he's a toy and made of plastic, Buzz Lightyear is a spaceman on a mission fully of snappy catch phrases. See them in Toy Story.

Jim Halpert is a master at the art of making it through the work day, including participating in an office Olympics. See them in The Office.

Though Twilight might be opposed to it, her new friends might just be able to teach this serious-minded pony how to relax. See them in My Little Pony.

An infamous vampire, Alucard is a one-man killing machine with a philosophical side. See them in Hellsing.

Resourceful and pragmatic, Selina Kyle always keeps in mind her number one priority: herself. See them in Gotham.

Trying to get through school without being a burden to anyone, Tohru Honda stays cheerful despite her difficulties. See them in Fruits Basket.

Tamaki Suoh is always the star of the scene because he's the one making a scene. See them in Ouran High School Host Club.

Ellen Ripley defines the word "badass." When she's not leading her crew on an interstellar voyage, she's slaying terrifying creatures. See them in Alien.

Noah Calhoun is lost without Allie, who seems to have moved on. See them in The Notebook.

Aragorn is the one true king, a title he is too humble to accept. See them in The Lord of the Rings.