Because you like Ted Mosby in How I Met Your Mother

It's a race against time to develop his theory of the origins of the Universe before Stephen Hawking's body and mind give out. See them in The Theory of Everything.

Relentlessly cheerful and optimistic, Erin Hannon is an office receptionist. See them in The Office.

The Genie is the perfect buddy, granting every wish we might have and keeping life good-spirited. See them in Aladdin.

A meek schoolteacher, Mary Margaret Blanchard can't remember her past as a spirited, swashbuckling Snow White. See them in Once Upon a Time.

Danny Zuko's car is auto-matic. Its system-matic. Its hyyyyydro-matic. Why, its greased lightning! See them in Grease.

Marge Simpson is a mostly happy housewife and subscriber to Sponge and Vacuum Magazine. See them in The Simpsons.

A formerly adventurous playboy, Will Traynor has become cynical by what life has thrown at him. See them in Me Before You.

Michael Scofield is no criminal, and he didn't get jailed by accident. See them in Prison Break.

D.J. Tanner is a rebellious teen who wishes her lame dad would butt out of her personal life. See them in Full House.

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.

An opinionated pothead with a passion for conspiracy theories, Steven Hyde is secretly more sensitive than he lets on. See them in That '70s Show.