Because you like Cookie Monster in Sesame Street

She's mostly doom and gloom, but you'd get nowhere without Sadness. See them in Inside Out.

Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.

Ellie is more world-weary than most 14-year-olds. You would be too if your world was infested with zombies. See them in The Last of Us.

Although Mako Mori may be small and quiet, she is a core of battle-hardened steel. See them in Pacific Rim.

There are a lot of rules in their society for women like Emily Dickinson. But Emily is a rule-breaker. See them in Dickinson.

A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.

Community-driven but practical, Calvin Palmer is a natural leader even if he doesn't always see it. See them in Barbershop.

Vengeance is William Wallace’s game. With his father, brother, and wife killed by the English, he slaughters the garrison and sacks cities. See them in Braveheart.

Kathryn Merteuil may be a vain sociopath, but you won't be able to look away. See them in Cruel Intentions.

Jason Bourne is suffering amnesia, but considering what he's done as a CIA assassin, maybe that's for the best. See them in The Bourne Identity.

Known as the "rat king" of Paddy's Pub, bartender Charlie Kelly spends most of his time drinking at his bar instead of serving drinks to customers. See them in It's Always Sunny in Philadelphia .

With an incredible ability to fake a smile, Selina Meyer is a gifted politician serving as Vice President. And maybe one day the President will actually call her. See them in Veep.