Using a bike for transportation is just one way I have simplified my life over time.By that I mean eliminating unnecessary stresses and consumption and enjoying life more.I agree with your philosophy of not getting mad at the trivial and unavoidably annoyances encountered while cycling,or everyday life for that matter.My strategy is to enjoy myself every time I am on the bike and I have gotten to the point I actually enjoy and feed off the interaction with traffic and frankly it seems to rub off on the drivers as well because in general they treat me as part of the flow of traffic and better than when I am upset or being antagonistic.
I also find it challenging ,in a positive way, to use a bicycle for all my transportation needs, including weekend getaways and backpacking trips.The longer I am carfee the less I want to even get in a car.For some reason the idea just seems repulsive to me now sort of like cigarettes after you have kicked the habit for good.