Narcissism is actually a trait that every individual has. One needs a healthy dose of it, to be able to feel confident in their ability to function in life. However, Narcissistic Personality Disorder is much more than just being confident. People who have Narcissistic Personality Disorder have a great desire to be admired. This might result in them constantly trumpeting their own qualities; and putting others down, to make themselves appear more important and special. Clinical Psychologist Joey Tai provides some insight into Narcissistic Personality Disorder.