I am posting another one of Sam Vaknin's links here because he says it so well. Most regular people cannot understand the stuff he writes but I get it pretty good. Of course his info is coming straight from the horse's mouth shall we say. After all he is most certainly the first authority on the subject of Ns. Given there are all kinds of Ns in the World. But pretty much ALL of them share a certain subset of personality characteristics. That is of course, the reason for the label of NPD.
Here Sam speaks of the place I call the "N-World" that special little place where all "N-Victims" are dragged, kicking and screaming, into.