Because you like Alyx Vance in Half-Life 2

An all-business doc , Miranda Bailey dispenses tough love to the interns she trains. Emphasis on "tough." See them in Grey's Anatomy.

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

Lily Aldrin is a flaky but supportive kindergarten teacher and painter. See them in How I Met Your Mother.

In Dennis Reynolds' mind, only a psycho wouldn't have a six-part system to bring home women. And he should know. See them in It's Always Sunny in Philadelphia .

Equal parts funny and neurotic, Cory Matthews has a warm and generous spirit. See them in Boy Meets World.

Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.

Liesel Meminger is trying to ease the suffering of those around her, German and Jew alike. See them in The Book Thief.

Nick Miller might not have a bank account, but he defintely has a lot of love to give. See them in New Girl.

Beneath Arthur's brash demeanor lurks the heart of a compassionate future king destined to unite the five kingdoms. See them in Merlin.

Smart, sarcastic, and loyal, Stiles Stilinski doesn't just want to be the sidekick in someone else's life. See them in Teen Wolf.

Kat Stratford is part of the "out" crowd and proud of it. See them in 10 Things I Hate About You.

Amber Holt is perpetually caught between forging her own path and stumbling around in the dark. See them in Parenthood.