I usually wear a helmet. However there are times when I don't. I believe in helmets, I just don't feel that anyone else,(unless I'm a passenger, then the rider can) has the right to tell me I have to wear one. I also disagree with the mandatory seatbelt law, though I wear mine.
From personal experience, I have found some helmets do obstruct my vision and hearing. I have a full face helmet, which needs replaced due to age (of the helmet!), that I always wore. Then didn't wear one for a while, (either not riding or just short jaunts around town). Went to Missouri and wore the full face helmet. I couldn't see or hear as well with it on. New helmet will be either a 3/4 or half shell. I actually did a paper on the helmet laws probaly 5 yrs ago. The statistics at that time showed no real difference between helmeted riders vs non helmeted riders death rates due to no fault accidents. I personally know people who if they had been helmeted would now be dead, and also know people who if unhelmeted would be dead. There are timeswhen a helmet can actually cause further injury, but it can also save your life. Motorcycling is a choice, a lifestyle, and, if done with proper traing/education, is no more dangerous than many other choices people make. Cagers (car drivers) need to be educated as well. Many times they are the cause of the accident simply because they don't watch for bikes, misjudge speed, or just don't see them. As far as the cost goes....they say if you have a $10 head, then put a $10 helmet on it. As a nurse/ems person, I v'e seen people injured in car accidents many more times than a motorcyclist. I know that accidents happen, but at least around here a car accident,with serious injuries, is much more common. My sister is a State Trooper, and she says the same thing. Why people choose not to wear a helmet is as varied as why some people decide to be a nurse and some people decide to be a stockperson. My husband rides his bike to work almost daily, and wears a helmet. Never used to wear one, but does now. What changed his mind? Age, dropping his bike hard with one on, who truly knows? I don't question him, just glad that he wears one. My daughter is not allowed on the bike without one. We also do not ride in shorts or flipflops. Jeans, and solid shoes, preferably boots, are required.
Sorry this is so long, just got going. Bottom line, it should remain personal choice. Do I advocate wearing a helmet? YES. Should the govt be able to say I have to? NO