Because you like Lyra Belacqua in The Golden Compass
Prim and proper Allie Hamilton was raised to follow the rules. But she's got a fiery rebellious side too. See them in The Notebook.
The brilliant Mona Vanderwaal is proof that undergoing an "extreme makeover" isn't always a good thing. See them in Pretty Little Liars.
Jax Teller can be cool or vengeful, calm or wrathful, depending on the situation. See them in Sons of Anarchy.
Don't ask Rosa Diaz, a Brooklyn detective, to lighten up. Actually, to be safe, don't ask her to do anything! See them in Brooklyn Nine-Nine.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Homer Simpson is a beer-loving disaster in charge of nuclear safety in Springfield. Everybody run! See them in The Simpsons.
Audrey Horne may seem inquisitive and charming, but she can turn on a dime. See them in Twin Peaks.
Relentlessly cheery Ned Flanders enjoys a nice piece of bread with water on the side for dipping See them in The Simpsons.
Britta Perry has never met a cause she couldn't passionately champion—at least for a little bit. See them in Community.
When the going gets tough, Rick Grimes gets tougher. It's a very useful trait when the world goes to hell. See them in The Walking Dead.