One of the most (pleasantly) jarring things I noticed about my move from NYC to SF is how totally dominant pedestrians are in SF, how totally deferential drivers are to pedestrians, and frankly how polite drivers are to each other. SF is filled with 4-way stop signs, and there's a very efficient (unspoken) system of coordinating who goes when (based on arrival time at the stop sign). If you dare break the system, you get yelled (honked) at mercilessly.
As a pedestrian in SF, I sometimes have to insist that cars go ahead (I'm rarely in a rush when I'm walking, and I know how frustrating it can be as a driver to wait for a slow person to meander across the street). You need to do nothing more than approach a crosswalk and every car in every direction will stop and wait for you to cross -- people even insist that you cross and will stop their cars while in mid-turn. I find that sometimes ill have to actually walk away from the curb if I'm waiting for someone or not actually crossing yet, otherwise I impede traffic. It's pretty cool.
I spent a weekend in New Orleans recently, and one of the first things I noticed was the complete lack of that pedestrian deference. Step in the street at a crosswalk and cars will rush to get through before you start crossing.
I guess that's what they mean when they say "Live in Northern California, but leave before you get soft" ;)