There are two types of narcissism: grandiose (or overt) and vulnerable (or covert). Grandiose narcissism is marked by extroversion, self-confidence, attention seeking, and aggression. Vulnerable narcissism is characterized by introversion, high sensitivity, negative emotions, and a need for constant recognition and reassurance. A unifying theme of all forms of narcissistic personality disorder is self-enhancement, the belief that one’s thoughts and actions set them apart from others.