Helmet choices?
I do both.
Depends on which bike I'm riding.
Casual ride on the grocery getter or folding bike, not going to be bothered wearing a helmet.
Hard riding with intervals and fast riding usually comes with an increased risk of crashing, and have done so a few times.
I have face planted into the pavement at 30km/h and walked away, my helmet was useless at preventing injury, a full face helmet might have helped with the road rash, and busted teeth.