Do you ever get tired of hearing your own voice? I've been doing so much talking at work lately (meetings, formal and informal have suddenly taken over my life) that I can't stand to hear myself talk once I get home.
I used to have the opposite problem. At an early job of mine, I worked in almost total silence. I was working on some technical stuff by myself, and so except for a "good morning" or a "see you later," I wouldn't say a word to anyone the whole day! After months of this, I found that I had gotten somewhat "out of practice" with talking, and if I talked for more than a few minutes I would get a sore throat.