People are fascinated by evil because it's mysterious and it doesn't seem to have a rationale behind it, and the second you say that Hannibal Lector was abducted as a child and he had to eat his sister or something like that, it becomes immediately mundane. The character becomes mundane.
“I got access to a private tour of the zoo. I got to go in a cage with a koala, which I highly recommend.”
“Had I listened to my agent, I'd be running around in tights, climbing buildings and stuff.”