First-- thanks for posting that about Narcissistic personality disorder, NM! I have researched this kind of thing before. My mom has NPD.
Example: One day, a Devotckha song was playing. My mom told WH and me that she had composed a song like that in her dreams the other day. (But didn't write it down.)
She does this kind of thing ALL THE TIME. NPD all the way.
However, I'm not sure that all experts agree that it exists. My therapist said she has Borderline Personality Disorder with narcissism. (Mayo Clinic is really reputable, tho... maybe it's just my therapist!)
I think there's a difference between NPD and a regular narcissist, though. And there are degrees of severity, of course.
I don't think my WH is a straight-up narcissist, but I think he is being really narcissistic right now.
Just had to throw that in there. Got more to say about the other part, but I want to see if you respond to RobX first!