This is such a noob question and something I've never really thought about before. I've always set up brakes so there is a 'reasonable' amount of lever travel using the mountain bike concept of a having the brake lever sitting a bit closer to the handlebar when braking on a long descent helps avoid cramping or aching hands. I don't mean that I set them up with loads of movement, but conversely I've been told that there should be pretty well as little movement as possible - light switch like.
Weirdly I can't find anything on-line about this? Who's right, or does it just boil down to personal preference? Any links to clarify, and set this in stone?