Because you like Kesuke Miyagi in The Karate Kid
Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.
Louis de Pointe du Lac is wanting to find a way of living that doesn't make him miserable. See them in Interview with the Vampire: The Vampire Chronicles.
There are rumors that the Spirit was an Egyptian Pharaoh in his past, but without any memories, he doesn't know how true they are. See them in Yu-Gi-Oh! .
David Rossi may chase serial killers for a living, but he's more interested in what wine pairs well with tonight's parmigiana. See them in Criminal Minds.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
Experiment 626 was designed for one thing: to destroy everything he touches. See them in Lilo & Stich.
Mavis Dracula's interests are anything black, scream cheese, and flying around. See them in Hotel Transylvania.
Leonard "Bones" McCoy is passionate, moral, and ready to stitch you back together. See them in Star Trek.
Petyr Baelish's main assets? A sharp mind, deep pockets, and no scruples. See them in Game of Thrones.
Alex Danvers is a brilliant engineer tasked with alien threats, and one of those aliens is her adopted sister Supergirl. See them in Supergirl.
Illiterate and oblivious, Crash Bandicoot is still a hero. See them in Crash Bandicoot.