Because you like Donna Pinciotti in That '70s Show

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

Being beautiful and rich doesn't guarantee happiness for Cheryl Blossom. See them in Riverdale.

Robbie Turner has been accused of a crime he never committed, changing the course of his life forever. See them in Atonement.

A legendary warrior with a complicated relationship to the truth, Jaime Lannister is revered and reviled in equal measure See them in Game of Thrones.

Sarcastic and always complaining, C3PO is a droid that despite his quirks you always want by your side. See them in Star Wars Series.

James Wilson is a compassionate doctor who willingly plays the sidekick. See them in House M.D..

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

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

Summer Roberts is privileged and preppy but also surprisingly open-minded and fiercely loyal. See them in The O.C..

On the outside, Gwen seems meek and calm. But she has an inner core of steel. See them in Merlin.

A man of the court, Lord Varys knows how to manipulate it better than anyone. See them in Game of Thrones.