I have nothing to say about that, not having read/watched a lot of villain monologues in the past few years--nor composed my own. Item 6
Such verbal gloating was a sign of vulnerability, of weakness. The villain needs something from his victim, some sign of pain or despair. Some writers give the victim (before the climactic table-turning later) a way to thumb the nose at his tormenter, to frustrate him. Some of the most notorious real villains didn't bother confronting those who are about to die to gloat or anything else. They didn't need any confirmation from their victims.
It's harder to show a hero's courage and defiance without such scenes, though.
