I worked full time in the past but I can't anymore...I burnt myself out. I forced myself to go to work even though the sounds (constant talking, interaction, etc - it was a call center and i was a customer service rep) was like torture to me. At one point I went to the ladies room and tried to break my own ankle by stomping on it, in the hopes I could go out on disability for awhile. It didn't work, and I had to return to my desk.
Anyway, I stayed way beyond what I could handle, so now even when I try to work part time I only stay about a month and then I can't handle it anymore. As of right now I work from home as a freelance writer; it's the longest job I've had in almost 8 years.