"a true egomaniac – that is, to be diagnosed with what psychiatrists call Narcissistic Personality Disorder (NPD) – one must show at least five of a number of different characteristics including: a grandiose sense of self-importance; preoccupation with success and power; arrogance; Need for excessive admiration; a sense of entitlement; exploitative; lack of empathy; a belief of being unique and feeling of envy towards others.
They have no regard for other people and resent any weakness or vulnerability in others. They feel no need to take responsibility for their actions and won't accept being challenged or criticised. The ultimate egomaniac is the cult leader. They get to be at the centre of a group of adoring followers, giving them the god-like status they think they deserve."
You just gotta love egomaniacs... 