Straight: Dr. Villainous Evil styles himself as a Genre Savvy character who knows he's a villain, refers to himself whenever the subject comes up, and often responds to someone's criticisms of his moral character with a hearty Insult Backfire rejoinder.
Exagerrated:
Dr. Villainous Evil appears to be basing his every action on what would be the most villainous thing to do.
The world is ruled by a Balance Of Good And Evil, and Dr. Villainous Evil gains power by allying with the forces of evil.
Evil is Cool or Evil Is Sexy: Dr Villanous Evil doesn't personally think he's evil, however, he pretends to think he's one as villains are popular/chicks dig the bad guys.
Dr Villanous Evil is such a Complete Monster that he can't possibly find a way to justify or explain his actions as anything other than him being evil.
Dr Villanous Evil used to be good and also believed in moral absolutim. He refuses to give up his moral absolutism even as a villain, and because of this, he believes himself to be in the wrong.
Inverted:
Villain with Good Publicity, who works hard and successfully at convincing the world that he is good and not evil.
Dr. Villainous Evil is doomed to a 0% Approval Rating because he never pretends to be anything but evil.
The reason Dr. Villainous Evil chose that name is that he's actually disgusted by the moral absolutism of the "heroes". Ultimately, he ends up saving the world since he's a Noble Demon, but since he presented himself as the ultimate bad guy, no one realizes this until long after his lonely and celebrated death, having been bound by his own ideological image.
Dr Villainous Evil comes to the realisation that he no longer needs to justify his actions in any moralistic fashion, since it would clash with seeing himself as the villain. This leads him to become unrestrained in his evil, plummetinginto depravity.
Dr Villainous Evil sees himself as evil due to his self-hatred.
Conversed: "Why do the villains on these shows just come right out and say that they're 'bad'? It's almost as if they're unclear on what the word 'bad' means."