Affably Evil

Cartoon villains who are genuinely polite and friendly in spite of being villains. They will frequently both speak and act in an extremely polite and thoughtful manner even to the heroes they face (though some of them may be two-sided about it, and might occasionally provoke or insult them during a fight, though that is a rare sight for them), and their friendly and considerate nature often comes as a surprise to both those heroes and possibly also the viewer.