I do not believe that introversion is a real personality trait

The number of people who will tell you they are introverts is astonishing. You can talk to the most dynamic, engaging person in the world--someone with thousands of friends, who goes to parties every night--and he'll tell you, "Oh, I actually find it hard to talk to people. And I usually prefer to be alone. I'm kind of an introvert."

The truth is, everyo…