Because you like Tom Ripley in The Talented Mr. Ripley
Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.
The witty Aku would be an ideal dinner guest, if he weren't a demon. See them in Samurai Jack.
Jail hasn't broken Andy Dufresne's spirit, but will his spirit help break him out of jail? See them in The Shawshank Redemption.
Samantha Jones is a try-sexual who'll try anything once. See them in Sex and the City.
Wheatley's got an endless supply of bad ideas that he wants to share. See them in Portal Series.
Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.
Handsome Jack is wearing a mask of his own face to hide his scarred real one. See them in Borderlands Series.
Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.
A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.
This master marksman may be a villain, but Deadshot's motives aren't quite as selfish as they seem. See them in DC Extended Universe.
Sephiroth wants nothing more than to seize the power of the Lifestream in order to become a god. See them in Final Fantasy Series.