At age 18, in 1973, I put a 2-3 inch gash in a helmet when I hit a berm and went over the handlebars. I was doing maybe 30 mph. I have ALWAYS worn a helmet since. This was in CA and I could ride without a helmet at that time...........
When I ride on long trips, I usually wear a helmet. Depends on what state I’m traveling through. But for in and around travel, I would rather not. I’ve been riding for 40+ years.