I feel safer, therefore I ride more relaxed and natural when I ride. For me the helmet is +1
Others think it affects balance or understand the results of an accident to be more severe should they wear a helmet. Their more natural stance is therefore non helmet. Each to their own.
It's all about choice and whilst we have a choice every rider will and should exercise their choice to wear one or not.
On the flip side, should wearing a helmet be made compulsory by law would all those riders who have loved and enjoyed the sport for many a year, simply stop cycling in protest or find that the new restriction will no longer allow them to continue riding? I personally think we are heading towards the compulsory wearing of helmets and I shall watch that one with interest.