Egotism is the drive to maintain and enhance favorable views of oneself, and generally features an inflated opinion of one's personal features and importance. It often includes intellectual, physical, social and other overestimations. 

The egotist has an overwhelming sense of the centrality of the 'Me', that is to say of their personal qualities. Egotism means placing oneself at the core of one's world with no concern for others, including those "loved" or considered as "close," in any other terms except those subjectively set by the egotist.

Characteristics

Egotism is closely related to "loving one's self" or narcissism - indeed some would say “by egotism we may envisage a kind of socialized narcissism”. Egotists have a strong tendency to talk about themselves in a self-promoting fashion, and they may well be arrogant and boastful with a grandiose sense of their own importance. Their inability to recognise the accomplishments of others leaves them profoundly self-promoting; while sensitivity to criticism may lead on the egotist's part to narcissistic rage at a sense of insult.