Because you like Jimmy Neutron in Jimmy Neutron: Boy Genius

Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.

They say they saved Adam Jensen by turning him into a cyborg, but he's not sure saved is the right word. See them in Deus Ex Series.

Knuckles the Echidna is a 16-year-old red echidna (aka a spiny anteater) and guardian of the ancient Master Emerald. See them in Sonic the Hedgehog.

Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.

Barry Egan has too many anger issues to list here. See them in Punch Drunk Love.

Leatherface's moods change with his masks. See them in The Texas Chainsaw Massacre.

Once a handsome prince, the Beast is now a grumpy, furry, monster. It's hard to pinpoint which mammal he resembles the most. See them in Beauty and the Beast.

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.

His name is Chucky, and he's your friend till the end. Hidey-ho! See them in Child's Play.

Mac is a karate-chopping, beer-chugging schemer. See them in It's Always Sunny in Philadelphia .

Keeping your cool is just as useful in the underworld as in war, and Michael Corleone is stone-cold. See them in The Godfather.

Gordie Lachance never had any friends later on like the ones he had when I was twelve. See them in Stand By Me.