Vanity

Adjective

Vanity is known as excessive pride regarding one's appearance, ability or achievements.

Vanity can be viewed as a positive or negative attribute depending on who it is used.

Vanity when used in a positive manner can assist with a persons confidence and beliefs in oneself.

When Vanity is used negatively people can suffer from narcissistic tendencies and inflated confidence. 

Example of Vanity in a sentence
The handsome actors vanity was well know.  

Synonyms
Confidence, exuberance, narcissism