I have, yes. One thing about that, though, is that even though he is the Main Character, as in the primary character of the book, I never do anything from his POV. * grimaces * The main reason was that it did not work for the way I needed the story to go, especially on an emotional level. But the secondary reason is that it would have been a horrible and miserable book to read if it was done from his perspective.
And I think that is one problem with having a villain as a protagonist... typically, you're going to have to write a lot of the book from his POV. And villains... well, I know some fantasy villains are exceptions, but in my experience with real villains, they are not only evil, they are often also ugly and disgusting and dirty. And they think ugly and disgusting and dirty things. And if you as a writer have to write from inside the head of the ugly, disgusting, dirty villain, and the reader has to read from inside the head of the ugly, disgusting, dirty villain, it's just... ugly. And disgusting. And dirty. * grimace *
And depressing, like you guys have mentioned.
There's another story I have that also has a villain for protagonist, and it doesn't have that problem, because the whole point of the story is that the protagonist doesn't think she's doing any harm (how she could think that has a lot to do with the world she's in). And the point of the story is really about whether she is or not, and how it affects her.
It's tougher when the villain is actually... villainous.
