I have always thought I'm an extrovert; on Myers-Briggs assessments (the short, quick ones) I have always been about 56% extrovert. But I've started to realize that I don't like crowded gatherings anymore. Anonymous crowds -- fine. But crowds full of adults, like last night's preschool potluck? I chose the table on the edge, near a corner, farthest from the traffic of the food tables. When we were in the gym, I mostly stood by myself and watched the kids -- and I was happy there.
I've noticed this more and more. At the holiday party at school, I sat at a table (again on the edge) and left as soon as the first people started to leave.
Is it possible to change your personality? Because I think I have.