Someone once told me that the difference between introverts and extroverts is that introverts recharge by being alone (like any normal person) and extroverts recharge by being with others (like vampires). I live with two extroverts, which is helpful in that they keep me from becoming a complete hermit but also terrible because they have no concept of the utter emotional and physical exhaustion that comes from living in a world that is too peoply.
