I found this site about a year and a half ago, and keep having to take breaks from it as well. Too much of a time sink, and VERY addiciting. It is like having a group of very intelligent indivduals in your living room chatting while you have other things you need to do. They just keep talking about interesting subjects, and you cannot HELP but join in!
I have found it very stimulating here (mentally! – mind your manners please), and the pithy banter is spreading into my regular face to face life as well. In short, i am becoming a big pain in the ass, no one understands what i am talking about half the time, and I am sharing my opinions a bit too readily. But… whatever!