So the first thing that has started bothering me about the US is that they drive on the wrong side of the road, so I never know which side to look when I cross !!!
And then you have to worry about not jay-walking, and not standing on the wrong side of the road when you are waiting for a bus, and you have to remember when to pay the driver (its not fixed, it depends on the time of the day, and the direction the bus is going - I think).
Hadn't thought that non-drivers would also get confused about looking left/right first, and then crossing.