Because you like Wesley Crusher in Star Trek: The Next Generation

This power-hungry Time Lord calls himself the "master of all." Bonus: he has 13 lives. See them in Doctor Who.

Li Shang will make a man out of you—even if you're a girl. See them in Mulan.

White Witch's heart is as frozen as the land she rules. See them in The Chronicles of Narnia.

Chris Chambers is from a family of social outcasts and criminals, and he wants more than anything to avoid ending up like them. See them in Stand By Me.

It's impossible to say whether Winifred Burkle is cuter than she is smart, or vice versa. See them in Angel.

In Ziva David's world, you grow up fast; you don't have a choice. See them in NCIS.

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

Britta Perry has never met a cause she couldn't passionately champion—at least for a little bit. See them in Community.

There's erratic, and then there's Senor Chang. See them in Community.

Kayla Day is externally shy, but internally spirited Gucci! See them in Eighth Grade.

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

Often the one to deliver bad news to the families of victims, Jennifer Jareau isn't sure this is what she signed up for. See them in Criminal Minds.