Zig Zagged: Eugene outwardly appears to be a sleazy arrogant jerk...but then it turns out that he was just a nice guy all along. Then it turns out that that Eugene was just a robot...then the real Eugene reveals himself, and he's a sleazy arrogant jerk...but then the heroes fatally wound him in a fight, and he says that he was just pretending to be a sleazy arrogant jerk before dying. But then it's revealed that that Eugene was a stunt double, and the real Eugene comes out and has a Villainous Breakdown because you destroyed all his robots and stunt doubles, but refuses to back down because his pride is at stake. The heroes brutally slaughter him.
Averted: Eugene lacks the charm and grace of a Magnificent Bastard, but he has a normal-sized ego.
Enforced: "I'd like my villain to be a contemptible, unlikable bastard. Let's give him an inflated sense of self-worth so the audience will want him to be beaten."
Lampshaded: "Man, Eugene, you've got some serious ego issues."
Invoked: Eugene lacks the charisma of a Magnificent Bastard and hints that he might be arrogant, too.
Defied: Eugene is a Knight Templar who has no sense of self-worth, devoting his cause to what he believes to be the greater good for the people, rather than himself.
Discussed: "Well, of course Eugene is an egotistical Jerk Ass."
Conversed: "Is it really all that impossible for Eugene to do something for someone else rather than for himself?"
Deconstructed: Eugene's ego and arrogance leads to him becoming a General Failure.