"He thinks he'll be remembered as the villain in the story"
She snorted.
"But I forgot to tell him," I said too quietly, opening the door, "that the villain is usually the person who locks up the maiden and throws away the key."
"Oh?"
I shrugged, "He was the one who let me out." 
― Sarah J. Maas

"The villains were always ugly in books and movies. Necessarily so, it seemed. Because if they were attractive-if their looks matched their charm and their cunning-they wouldn't only be dangerous.

They would be irresistible." 
― Nenia Campbell, Horrorscape

"I have been sometimes way too attracted by my own villains because in a way they seem to hold the secret to the heart of the narrative." 
― Peter Straub