No, I haven't. What is the point you are trying to make with this question? If you are referring to self Love, it isn't the same as a personality disorder.
Self Love, in the genuine sense, is encouraged. Without self Love, how can one have personal success in Life? :) I don't know anyone who has accomplished anything through "self loathing."
The ego, and self Love, are two completely different things. The ego can be risen above and overcome like anything else. It can be easily trained and makes a great co-pilot.
If you suffer from a personality disorder then you may want to consider seeking help for that particular disorder. :) Narcissism exists on both sides of the fence. It is a condition of a human being, it isn't the condition of any particular belief system, or non belief system.
No. People with narcissistic personality disorders suffer from a delusion, so you're kinda asking the wrong people.