There are two quirks of behavior that I have added in recent years and both seem to garner comments from my friends.
One is that I don't carry change. One less object in my pocket. One less object to pay attention to. When I get change from my rare cash purchase, it is sorted into quarters, which we seniors use for buses in San Francisco, and the rest goes into a pot. I charge virtually everything on a credit card, and local parking meters now take a prepaid card. Motorcycle parking requires change so I have taped a dime to the motorcycle key chain.
The other: When an ambulance or a fire engine goes by with sirens on I bow and gasho. Gasho is hands palm together. Ambulance drivers, paramedics and fire-people are all risking their lives everyday for humanity, complete strangers. If there was ever a profession of saints that warranted our appreciation, it is these three groups.
I find much to complain about the way fire-people run their public service, but nothing negates the compassion of their behavior.