I feel SO glad to read that I am not the only one! Granted, I've only been riding on the road just a little over 1 year, but I HAVE to mount from the left side. I MUST start with my right foot on the pedal and my butt on or almost on the saddle. This is how I roll

The latter isn't actually a concern on my Gunnar because I have proper leg extension. The mountain bike is a different story...