Not quite sure why everyone gets quite so aerated about it, it's a personal choice. But here's my tuppence worth anyway: if I took a piece of kerbstone the weight of your head, suspended it from a rope and said I'm going to let it swing at your head from a distance such that it would be travelling at 10MPH when it struck you, then gave you the option of wearing a helmet to protect yourself, would you take it? The best riders will come off occasionally through no fault of their own (my last off was swerving to avoid a fox which ran out in front of me on a deserted cycle path!), anything which gives one an edge, however slight, in terms of protecting the most important part of one's body (yes I know chaps but it won't work without your brain now will it?) seems to me a no brainer, as opposed to not wearing one which might result in a no brainer. Just my opinion.