I’d agree…for me, the version #3 rolling mount is easiest. I like to keep my seat pretty high, and have trouble doing the version #1 static mount unless I’m on at least a bit of a downhill.
But if I’m on a long endurance ride like the MS Bike Tour, I’ll generally use a pole or fence-assisted mount whenever there is one available. This serves two purposes. First, it uses up a lot less energy, which can make a difference over the course of 50 + miles. Second, it let’s me get everything just perfect–foot placement, jewels placement, etc.–before I start pedaling away.