I upset some guy the other day by stating that he wasn't a mountain biker; he likes to ride to places using a mix of roads and bridleways. He uses a mountain bike to get there and back. To me he's a proper cyclist; one who likes his bike as a useful mode of transport to varied locations, and who perhaps doesn't care too much what he rides so long as it does the job. Yet he took umbridge over not being labelled as a mountain biker, which I found rather odd. To me there are three'ish distinctions; mountain biker, cyclist and then roadie. In simple terms an MTB'er wants to hack through singletrack as fast as possible; a roadie will want to do a ton every ride - or at the very least "get some miles in"; whilst a cyclist doesn't care either way, they just want to enjoy the journey. I think the roadie and MTB'er are of the same breed; adrenaline junkies except roadies like a bit more pain. The cyclist is the all-rounder and perhaps the better person.