Count me in on one of those who can't lead or mount her bike from the opposite side. I've tried both, and ended up on the ground with the mounting one, and always trip over the bike with the leading one.

I have to say, though, my MTB has thrown me more than the horses ever did. But at least these ground impacts are from a much lower height with less weight landing on me which means no trips to the hospital Can't say that for the horses!