In a nutshell, introversion is not about a preference to be alone. It not about being anxious around other people. It is not about being overwhelmed by cortical activity in the absence of stimulation. At its core, introversion is about deriving less reward from being the center of social attention. Getting the spotlight is not that important or fulfilling. Extraverts, in contrast, love social attention. It energizes them, it brings out their best qualities, and it bolsters their stamina, extemporaneous thinking, and productivity… But not everyone can be easily classified as an introvert or extravert. —Psychology Today.