I do it for a lot of reasons. I do it because it has nothing to do with computers (which is my career and had been my hobby as well), it's a great stress reliever, because it is a huge challenge that gives expression to my competitive side, because the kids deserve to have somebody ref their games who really wants to do it right, for a bit of pocket money, to have a good excuse to hang out online, to get out of the house a bit, because it's great exercise, and to see how far I can go with it.