I'm in the middle, maybe leaning toward the introvert side. I'm a teacher, and my job can be pretty exhausting and I need "alone time" to recharge my batteries. Funny thing is, people in China regard me as an outgoing person because I've grown so used to standing in front of groups of people that I don't care how I come across. I just act like myself. I suppose it's a matter of cultural differences, because Chinese by and large prefer not to "show themselves," which makes teaching them a special challenge.
Good article! I am following you now.