Without going into too many personal details (PM or email me if you're interested in that), for a while I lived a lifestyle where my in-person socialization was limited, as were most of my links to the broader society (e.g. no TV), though I made a lot of money (at least relative to the surrounding community).

I also found myself frequently sad, which was very strange, as I felt all of my needs and wants were being met. It was only after a long time that I noticed the correlation between "being around other people" and "not being sad" -- and I'm an introvert!