Actually, Roleplaying has helped me become a more sociable person as it turns out. When I started, I was a really surly young guy with almost no friends. Through Roleplaying I was able to find a way not only to interact with people and make friends, but to actually find something I was GOOD at and enjoyed, and find a little bit of value in myself. It really puts you in the position of trying to figure out how other people think; how the character would react, how their past informs their present. Doing that on a day to day basis really helps with your empathy, makes it easier to understand the people around you. It's really helped me connect with people as the years have gone on.