Some horses, not well educated ones, are unsure when mounted from the right side because no one has done it do to a stupid superstition, they are creatures of habit and easily fall into the right side is normal routine, mounting from the right disrupts the horses comprehension and he may get stupid. Properly trained horses will trust a mount fro either side, they have left brain right brain reasoning and all training must be done to each individual side of the brain. Also you need to be able to mount either side because of various situations that may arise on the trail, one being a steep slope on the left, just try throwin your leg up an extra foot, always mount on the high side, or what if you blown your knee because your horse got stupid when you tried mounting from the right and now you cant use that leg to pull yourself up. Back to the kickstands, imagine all the times you pulled to the side of the road and do to the sloped away grading its difficult to balance the bike on the sidestand because the slope has your bike nearly upright, but if it was on the right the grading would have it leaning way to far, probably unmanageable in a heavy bike like an ST and the great amount of weight on the sidestand would most likely bury in loose soil and topple, and, and......