If you think that there's nothing better than being you, then you're full of egotism, a word for an inflated sense of self-importance.

Most people believe it's good to have positive feelings about yourself and healthy self-esteem. But some people feel a little too good about themselves, and that's called egotism. People suffering from egotism think the world revolves around them. They're arrogant, cocky, overconfident, selfish, and generally think they're better than other people. And having an ego of that size is generally not a good thing.

Definitions of egotism
  1. noun
    an exaggerated opinion of your own importance
    synonyms: self-importance, swelled head
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    superiority complex
    an exaggerated estimate of your own value and importance
    type of:
    conceit, conceitedness, vanity
    the trait of being unduly vain and conceited; false pride
  2. noun
    an inflated feeling of pride in your superiority to others
    synonyms: ego, self-importance
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    type of:
    pride, pridefulness
    a feeling of self-respect and personal worth
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