IMO if someone truly is DX'd as narcissistic, then it is a disorder that needs to be treated. Just because someone has good self esteem does not mean they have a disorder. You need to look at ALL the "symptoms" and the person, to evaluate the difference maybe? 90, if someone is a narcissist, it can be a negative factor in their life, and can lead to a major "burn out" that they never see coming, Unless you heed the advice of friends, whether you believe it or not, this could happen to you. Give it a try, if it's only high self esteem, the worst that will happen is you will be more insightful in the end...