Everyone has a natural preference for Extroversion and Introversion.
The Swiss psychologist Carl Jung recognized that people have a preferred mode in which they embrace the world. This mode, much like right or left handedness, is inborn and not something that we choose.
Extraverts and introverts differ in what they present to the world and how they recharge.
For extroverts, their natural energies, perceptions and decisions flow outward toward the world of people and things. They are stimulated by their surroundings.
Introverts have natural energies, perceptions and decisions flowing inward toward the world of thought and ideas. Internal processes stimulate the introvert.