Oh wow. I just finished reading a book called the psychopath inside. It's about a neuroscientist who discovers that his brain looks exactly like that of a psychopath. At first he is in denial - he's successful,married, has lots of friends, no crimes. But over time he comes to recognize the psychopathic qualities that he has. And one is this deliberately planned revenge, like you just described! You may want to read that book.
