Affably Evil

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. That said, they are still capable of losing their temper and will sometimes (temporarily) shed their polite nature if faced with defeat. Only true Affably Evil villains will regain (and retain) their polite nature after facing their defeat and will more likely than not, respect the hero even more.

Since friendliness is a redeeming trait, it is not uncommon for affably evil villains to be redeemed, or at least have the potential for redemption.