What makes someone egomaniac?

NPD

Well i wouldn't know. I am much too busy admiring my own beauty to notice such things~

Deep-seated insecurity

When it's a me-me-me world!

Probably feeding the ego too much and becoming ultra self absorbed. What we feed the most becomes the most fattened up.

When somehow they think someone else is less than them, for not choosing pizza first.

That’s me.

An undisciplined mind.