I see many people who like to be the topic of talks all the time, to be the center of attention. In one word, to be popular.
I also know few people who, on the contrary to the first group, do not need to be the center of attention. Instead, they seclude themselves from social life. In a subtle way, they see themselves better than the rest, but do not make a show of that.
The first group usually call themselves, in a humorous way, narcissists.
Although they might seem so in the first glance, they are usually somewhere close to the opposite. If Narcissism is characterized by self-love, egotism, and selfishness, I can see it in the second group and more clearly. A person who loves him-self, doesn't need to prove it to someone else, nor needs others' approvals or love (self-love makes him self-sufficient). An egotist doesn't care about people's opinions and a selfish person usually puts himself on a pedestal instead of becoming the subject of talks. He knows better that these sorts of talks in praise of someone, are nothing but absurd.
It might be linked to the difference of introversion/extroversion too. I don't know about extroversion, but one can be introvert by choice. By definition, Narcissism very much suits the second group (mentioned above), and introversion comes with the package.