Oh...one more point....you won't find a diagnosis of Narcissistic Personality Disorder attached to very many people, by a qualified clinician. This is because it is almost impossible to get anyone with that actual personality disorder into treatment of any kind...long enough to make a diagnosis. You won't even see many of them in a rehab program or anything of the sort...short of being forced there by the courts, employer, or such thing.
Even in couples therapy...(which they will rarely attend)...they are usually so good a presenting a good picture and manipulating that it is of no avail. Anyway, the behaviors that they do to another person can often be observed, only, outside of the clinical setting...in certain contexts.....