If I spend a lot of time socializing in a group of people I do not closely know, I will experience intense depression and loss of energy for about a day or so.

If I spend a lot of time socializing in a group of people I do not closely know, I will experience intense depression and loss of energy for about a day or so. That's introversion. I love being around people but it sucks the life out of me. I get energized through working on projects and reading. Inherently private pursuits.