Originally Posted by umd
I think its definately linked to how well your body regulates temperature. I've noticed that I am more comfortable in a much wider range of temperatures than most people I know and sweat
very little. I also have a moderate case of
Reynaud's which I think has something to do with it. I generally sweat so little (relative to others) that I can't drink much at once or it becomes very uncomfortable, and if I have sport drinks it makes it even worse!
I'm much like you in this respect. Although I think I cool off too well generally. I sweat very little unless it's steaming hot (above about 25°C in the summer) during the ride. I've been on long rides in moderate temperatures and arrive back home with my skin completely dry.
A pleasant consequence of this is that I don't have to wash my cycling clothes that often, and I rarely need to shower after a ride.