It really doesn't matter whether it's the villain or the hero. Sometimes the villain is the most colorful. But I prefer a part where you don't know what he is until the end.
The head of the CIA, it seems to me, would think long and hard before he admitted that former employees of his had been involved in the murder of the President of the United States-even if they weren't acting on behalf of the Agency when they did it.
As soon as one project is finished I like to go straight on to something else.