I've never known someone enough to think of them as a narcissist, not before or after reading the OP. That was a very informative post.
I do think I knew someone who had BPD, (bi-polar personality disorder.) She did things for attention constantly, it was pretty blatant, and she did put me down a couple times. I suppose she knew how to get under my skin even though she hardly knew me. Hardly anyone I knew liked her, men and women both, she was quite hard to get along with most of the time. She didn't seem to like herself overly much though either. She didn't strike me as an evil person, even if I didn't like her. When I think about it, I feel bad for her. Of course I wasn't in a close personal relationship with her, I only hung around her back in the day because she was a friend of a friend. She's married with kids now, seems much calmer than she was in her teenage years, and I wish her the best.
Since the topic's brought up, I also think I've had a roommate who was a psychopath or sociopath (I still mess those things up.) I have a hard time giving a description of who he was, but it just seemed that he only did things for himself yet he was very good at being friendly and close to people. He wasn't attention-seeking, but he's the only person I've known to actually steal a significant amount of money, (not for a drug addiction or something either.) I don't wish him the best, because best for him would probably be him duping someone out of money.
I guess either of these people may in fact be narcissists instead, but I never formed any sort of meaningful connection with either of them for me to really know.
As to NT's thinking aspies are sociopaths, I've had an aspie or HFA tell me he's a sociopath because of his lack of empathy. And then there's also the difference between cognitive and affective empathy. If you really want NT's to not think of autistics as sociopaths, there needs to be a differentiation of the lack of empathy that a psychopath has compared to the lack of empathy a autistic has, because as it stands 'lack of empathy' is a strong characteristic of both disorders.
As to people confusing narcissists with bi-polar personality disorder, I find it interesting the claim that narcissists aren't happy people either. If you have BPD and you say that you fear abandonment as key, and that you act up out of fear. That's fine, but how do you know how a narcissist is feeling? Because if you cite your emotions as different from theirs, you have to know what theirs are too.
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Not autistic, I think
Prone to depression
Have celiac disease
Poor motivation