Like Barry, I saw some fretwork way back when and always said to myself I really like that. Never having the time to get into it I would pick up the occassional magazine or catalog of patterns, glutton for punishment. Finally got a saw after talking my wife into how easy it would be to make a pine wood derby car with my son. Since then I haven't looked back, it's a great stress reliever (except I started selling at shows this holiday season which seemed to counteract the stress relief somewhat, last minute decisions aren't always the best ideas). All in all I too find it very zen like, can just go out in the shop and lose myself in what I'm cutting, so far I haven't found anything else like it.
Don