Annoyances? People who make conversations about them

Everyone wants to talk about themselves, it's just human nature. That said, when having a conversation I believe there should always be common interests and somewhat of a common ground. It annoys me when a person I'm having a conversation with always finds a way for the subject to be about them. Personally I think it's completely obnoxious and self centered. Don't get me wrong it's great to talk about a yourself briefly, but to make each topic related to yourself is ridiculous to me. Sometimes I feel people have self love issues when alone and whenever they get the chance to brag about themselves, they do just that.