I've always been a quiet and shy person too. If I'm talking one on one with someone, I'm okay, but if you throw in more people, I just clam up and keep my mouth shut. I sometimes think part of it is that I get easily annoyed by people who just ramble on and on and I get scared to be that person. The one everyone else is looking at and saying, "I wish this idiot would shut up!" It does make people wonder what's going on with you when you don't talk much though. When I first started working, I never talked to anyone much at my job. I was later told that the people I worked with were a bit scared of me because I never said anything and stayed to myself. But, on the positive side of all of this, I've also found that keeping quiet can sometimes be a good thing in the fact that whenever you do have something to say, people actually listen. That's been my experience anyway.