Because you like Joey Gladstone in Full House

Brian Griffin is the most scholarly member of the family—when he's not drunk on martinis. See them in Family Guy.

In charge of stocking the office's supply of cigarettes and liquor, Joan Holloway could run the whole company if they would let her. See them in Mad Men.

C is for cookie, and that's more than good enough for him. See them in Sesame Street.

Jack Skellington is a nightmare-man with a soft heart and smooth voice. See them in The Nightmare Before Christmas.

A resourceful ship systems engineer, Isaac Clarke does his best to batttle the infection spreading across space. See them in Dead Space.

Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.

Samwell Tarly is a scholar, not a fighter. But that's not good for an aspiring member of the Night's Watch. See them in Game of Thrones.

An off-beat dork, John Egbert is funny, inventive, and endlessly optimistic. See them in Homestuck.

Most of the world has been wiped out from The Beast. And when The Beast comes, Cole MacGrath will be ready. See them in inFAMOUS.

Marshall Eriksen is a lawyer in love who is enjoying life. See them in How I Met Your Mother.

Good-natured, sensitive, and introspective, Mason is on a lifelong path to finding himself. See them in Boyhood.

A bloodsucker, Carlisle Cullen is actually more likely to give you a blood infusion. See them in Twilight.