While those three groups of people do have a lot in common, there's also distinct differences. I never fully "fit" the NPD diagnosis because of my inner motivations for showing some of the criteria, and I never fully "fit" primary psychopathy because I have too much emotional depth and I'm capable of remorse(although it's a rare occurrence.) Calling me a Sociopath is probably the most accurate label for me when it comes right down to it.

I've known a few full blown psychopaths, a handful of narcissists, and only one other sociopath to my knowledge. I know the "red flags" for psychopathy very well so if you do want to discuss your mother I don't have any problem reading and giving you my opinion.