I don't usually post here, but the thread title caught my eye. I keep one of my belt-drive bikes built as a singlespeed. For me it's about the elegant simplicity that I suppose takes me back to childhood when the act of riding a bike was to hop on and pedal. Singlespeed forces me out of the saddle sometimes, and keeps me moving around and more engaged on the bike than when just sitting and spinning w/gears. I'm not 100% committed to singlespeed, but it sure is a fun option to have.