I ride based on a philosophy I call "centaurian".
My bike takes me places, but is different enough from a car to not limit itself to the legal hinderances I face while driving.
I am not a pedestrian while riding a bicycle, but I have the same perspective and hazards as a person walking.
When I ride my bike in the city, I approach each situation as a pedestrian (i.e. use of sidewalks, crosswalks, and safely running lights/crossing streets) and as a vehicle (i.e. riding in traffic, signaling lane changes, etc.)
My sister is a former triathalete, and very 'VC'. I actually commute by bicycle, and play by the rules above.
Having a bike to me is like being a centaur, half'n'half. Why should I treat my bike like a car?
What's wrong with my way, that it makes my sister so angry? I'm curious. My way works for me.