I'm the type of guy that always moves with purpose. When I'm done doing something, I'm quick to leave. Looking back on my life so far, I think this has often been mistaken as antisocial.
Every event involving humans is default social. Leaving quickly precludes much of life's social whimsy.
When I started my Ph.D. program, there was a weekly seminar that I started going to. At first, I instinctively left each week immediately after the talk was over. But I noticed that a lot of people would hang around afterwards and chat. Even though I found it a bit awkward, I started following their lead -- a habit I'm very glad I developed!
It's a good energy to bring to work or to a crisis. Everywhere else? Maybe not so much. I appreciate you mentioning it here; it can serve me also, as a reminder to work on that.