When I had my CK20 I almost always got on and off the left because the loader control was in the way. One day at the end of a long day I was stretching fence with the tractor and the fence kept getting caught on roots. I would get off, walk around the tractor, loosen the fence from the roots and walk back around the tractor. After about the third time instead of getting off the left, i stepped off the right. As I was stepping off, my denim short pants leg got caught on the loader handle. I then fell / jumped the rest of the way off and in the process popped the loader handle out of the valve. I ended up having to load up the tractor and haul it nearly an hour to the dealer to get new upgraded parts installed on my loader valve and handle.
I have a different tractor now, but I get off the and on the left side.