I've always needed significant amounts of alone time and never suffer in the absence of people. Without regular periods of solitude I feel unglued and harried and I get very irritable. I feel like I'm dropping the ball because of not being able to pay attention to my internal world. I'm sure I could manipulate it somewhat but I also have a strong liking for the things introverts seem to prefer. Not shy or socially anxious either for which I think introversion is often confused. (I used to be quite shy but grew out of it.)
As it happens, I have been out socializing/networking almost every night this week. I feel so splintered and chaotic. I haven't had time to internally process anything the way I normally would.