I remember reading the back cover of a movie - I think it was “Fantastic Four” - where they boasted about how they had the deadliest supervillain ever.
I also remember rolling my eyes.
Personally, I’m more interested in complex, entertaining villains who are interesting to watch. Preferably ones who are actual characters, with intriguing personalities and realistic motivations, instead of being pointlessly, one-dimensionally evil. I’m talking about Scorpius from Farscape, several of the Akatsuki members from Naruto, or a character from Puella Magi Madoka Magica whom I can’t name due to spoilers.
I also like the ones who, even if the writers are reluctant to give them an understandable motive produced by a clear backstory, are still thoroughly entertaining. Like the Joker.
What about you? What do you think are the most important ingredients when creating a good villain? I look forward to reading your comments.