I have never been anti helmet, sometimes I wore one (had to on club runs and competing) but if out on my own I never wore one, all change since I had an accident, broken shoulder badly damaged leg, but no head injuries, the only person who asked "were's your helmet" was a police woman, I was on my back in agony at the time, I think I must have have given her a what a tosser look as she immediatly said but you have no head injuries so it wouldn't have made a difference.
So why have I started wearing one? answer the wife insists even after I have pointed out pros & cons, so I am now £80 lighter after forking out for a Specialized Prevail I have always used cheaper slightly heavier helmets, but if I have to wear one all summer I want light & a good airflow, it doesn't feel any more comfortable than the cheap ones, but might be after a long hot day.