I don’t think unicycling has a Goofy. If we had a Goofy, people would say we also have a Mickey Mouse, and then the discussion would go straight to clowns and other stuff we’re not crazy about.
Left hand, right foot.
But my use of the left hand might not have the same origins as it does for riders of today. I held the seat with my left hand, so my quicker, dominant right hand could catch that old Schwinn seat in dismounts, saving it for yet more rips on the ground.
left hand, left foot forward (so right foot dominant: I freemount with right foot on pedal and left foot on ground, I jump with left foot forward and right foot back position)
I work hard to use both hands.
When I first started learning I would alternate which foot I put on the pedal when mounting and I continue to do this to this day. So I have no preference when mounting. Interestingly, I did not have to work one side more in order to keep them at the same level. However, when learning to idle I had to work on my left-foot-down-idle much more in order to keep it equal to my right-foot-down-idle. When riding muni I tend to hold the seat with my left hand but I’ve been working with the right hand to eliminate any preference. I haven’t learned how to hop yet so I can’t comment on that. In general I’m right handed and right footed (i.e. I kick a ball with my right foot).