I'm probably what you'd call an introvert. I get along fine with most people. I have no problem chatting about work and non-work subjects. I have no problem helping others with a coding problem, or asking for help when I have one. But I can't sit literally elbow-to-elbow with another person and share a keyboard for much longer than 10 minutes at a time.

My creative output happens mostly when I'm working in a solitary, focused manner. When we adopted mandatory pair programming it destroyed my productivity and my enjoyment of work to the point that I had to quit.