I used to wear a helmet always, I don't much anymore.
I don't need a helmet as much as most riders do, because I only ride recumbent bicycles. The bikes I own have a rearward weight bias, and will not flip me over the handlebars if I hit something, or if I apply the front brake as hard as possible.
You wanna lecture me about preventing head injuries?
Let's start with a type of bicycle that makes head injuries
a lot less likely in the first place....
Also, I generally ride mostly on rural roads, well way from motor vehicle traffic and pedestrians. Guess what most adult bicycle injuries involve?
.....
When riding in city traffic, I tend to think that
having a good head-mounted rear-view mirror (and using it!) is more important than having a helmet--and most people I see don't have that (even ones that have helmets). The rear-view mirror helps you
avoid crash situations, where the helmet only helps you after you've
gotten into a crash situation.....
~