Because you like Geordi La Forge in Star Trek: The Next Generation

Though she can seamlessly flit between glamorous identities, Sydney Prosser is more vulnerable than she pretends to be. See them in American Hustle.

Mark Sloan is the best plastic surgeon and biggest playboy the hospital's ever seen. See them in Grey's Anatomy.

Warm and caring, Kitty Forman acts like a mom towards all of her kids' friends. See them in That '70s Show.

Sabriel is smart enough to understand the dangers that await her and brave enough to face them anyway. See them in Abhorsen Series.

Don't let his old age fool you, Heihachi Mishima is a ruthless pragmatist who values self-reliance above all else. See them in Tekken .

Carol Peletier's credo: your strength comes from who you are, not who you used to be. See them in The Walking Dead.

After years of being a nerdy loner, Seth Cohen can't wait to shower charm on his newfound friends. See them in The O.C..

This barber doesn't cut hair. Sweeney Todd sends his clients down a chute to be baked into his partner-in-crime's pies. See them in Sweeney Todd: The Demon Barber of Fleet Street.

Topanga Lawrence has been a put-together intellectual since basically the moment she could talk. See them in Boy Meets World.

Success for Eggsy Unwin means joining Kingsman, and failure could mean death. See them in Kingsman: The Secret Service.

Greg Hirsch is new to the Roy family's cutthroat world of wealth and privilege. See them in Succession.

Whether it's a companion he’s failed or lingering guilt from the war, the Doctor can never truly let go of his past lives. See them in Doctor Who.