I became an extrovert at about age nine. In fact, I quickly became the class clown, a role I play to this day.
Until my 30s, I thought there was something wrong with introverts. No matter, more air time for me! An extrovert gains energy from others, and an introvert from him or herself. That is to say, when in a group, the extrovert becomes more powerful when receiving attention from others, and the introvert is drained.