I've been riding bicycles for years. I ride on and offroad using road, touring, and mountain bikes. I ride all seasons of the year including in the winter months on snow and ice. I even have a unicycle (that I really am not good at riding) and a dirt surfer.
All of these bikes and types of riding are interesting and fun.
After reading about fixed-gears/single-speed riding for years I decided to have one built for me to try. I really didn't know what to expect and to be honest I was a bit worried thinking that I might be nuts to even consider it!
I've had my Surly Cross check setup as a fixed-gear for around three weeks now. I can't explain exactly why but I absolutely love riding this bike. It's more then just the single gear or the fact that I have to pedal all the time but I can't seem to find words to explain or share the feeling I have riding this bike!
I started out with a low gearing of 36 X 18 (54 gear inches) and then after a few days moved to 36 X 14 (69 gear inches). I was worried about possible knee injury so I started out relatively low in the beginning. I am now about to move up again to 42 X 15 (75 gear inches). I climb and descend hills as well as ride on flat land.
My legs are definately stronger after riding the bike for such a short period of time. Racing friends has me very competitive even when going uphill. Riding downhill is still fun as I am learning the art of doing fast circles while seated.
I've ridden multi-geared bikes a few times since I started riding fixed. I find that I definately pedal more then I used to and I seem to be pedaling in higher gears then I used to as well. I also miss the feedback from the chain that you get when riding fixed.
I guess the important thing is that I am having incredible fun riding this bike. Although I enjoy my other bikes too, this one has captured me in a way that's totally different from any bike I've owned since being a kid. In fact I often feel a strong pull towards this bike whenever it's time to go out and bike somewhere. In a surprisingly short period of time it's become my flagship! (grin).
Explaining this feeling is very hard to do since I haven't been able to capture all the reasons why this bike is so damn enjoyable for me. Hopefully someone else here will also be able to understand (and perhaps even articulate) what makes a fixed-gear bike so damn compelling that it can take over your heart, body and mind in such a short period of time! (VBG).