So, when I come up with evil characters I watch horror, thrillers, supernatural, and drama shows to help me come up with my characters. Also, reading books with evil characters help to. I tend to pick characters who were scorned/hurt in the past by someone who then goes dark. I have a tendency to try to save my bad characters in some redemption like story though. I have a few that are beyond saving.
How do you come up with your evil characters?