1. Those who enjoy the benefits of their narcissism and would never darken the door of a therapist’s office. (These would almost always be the grandiose, overt, or psychopathic type).
2. Those who are ambivalent about their disorder and don’t think the benefits of healing would outweigh the emotional pain or think it would probably fail anyway.
3. Those who hate their disorder but think they can’t be healed.
4. Those who hate their disorder and are willing to do the hard emotional work necessary for healing.
5. Those who hate their disorder and don’t believe they can be healed but instead have learned to filter their words and deeds using practical or behavioral means such as CBT.
Sadly, the vast majority of people with NPD never become self aware (blindness to their condition being part of this disorder). They’re much quicker to gaslight and project their own narcissism onto others than admit they have a problem.
ETA: Someone at Psychforums suggested a 6th type: narcissists who know but just don’t care one way or the other. It just is; they’re neither proud of it or disturbed by it.