Because you like Hal 9000 in 2001: A Space Odyssey

Michaelangelo is an above-ground crime-fighter by night, and a pizza-eating, sewer-dwelling mutant ninja turtle by day. See them in Teenage Mutant Ninja Turtles.

Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.

The destroyer, Drax lives for one thing and one thing only: revenge. See them in Marvel Cinematic Universe.

Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.

Luke Skywalker always wanted to leave home, but he didn't expect that it would be as part of a quest to rescue a princess and save the galaxy. See them in Star Wars Series.

N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.

As Marlena Rosenbluth is finding out, confidence in the limelight doesn't always translate to power at home. See them in Water for Elephants.

A cruel pirate, Captain Hook still fancies himself a gentleman. See them in Peter Pan.

A bumbling hobbit, Bilbo Baggins is becoming a part of something much larger than himself as he embarks on a quest. See them in The Hobbit: An Unexpected Journey.

A daughter of a pair of superheroes, Hope van Dyne is scientist is brilliant and fearsome. See them in Marvel Cinematic Universe.