Introversion is not the same thing as being shy. Introversion is a personality trait, while shyness is a social anxiety disorder. Introverts and shy people are frequently mistaken, but they are not the same: introverts are drained by the outside world and recharged by the inner world, whereas shy people feel uneasy and self-conscious in social situations. Introverts can be great leaders. They mostly prefer solitary activities to social ones, and largely like to be alone, because their brains are more sensitive to dopamine—the neurotransmitter that handles pleasure and excitement.