Wow. What i have missed during my beauty sleep!
I had a look at some views of early Ford Model Ts to see what side the steering wheel is on, just out of curiosity, and came across this article. Some quite interesting claims regarding the considerations and development of which side of the road.
Logically speaking, since the vast majority of people are right handed then it would seem most natural that the right hand is used for the most sensitive work such as holding the reins or the steering wheel whilst the left does the other rough work like hand brakes and gear levers. When these levers were outside the vehicle and on the left then it made sense that the driver is also on the left but once these items were inside the vehicle then it was more practical for the driver to sit on the right.
Also, logically, i would have expected jousting horses to pass/drive on the right because the shield is in the left hand and would most sensibly be towards the opponent and not away from?
But anyway apparently kangaroos are actually predominantly left-handed… But i am not sure on which side they pass each other!
But it is now the 14th and our special day is over and we can go back to our struggles with which way to string a guitar, etc.
Thanks to all for the enthusiastic and enlightening input here!