I am pretty sure that everyone will jump opposite to their hand on the saddle.
I jump to the right, and I hold with my right hand, I grind on my back foot (also my right), and I spin to my left, but unispin to my right, and smallspin to my right.
I jump right foot forward, left handed and equally well either directions so i havent voted.
In theory i should be able to sidehop further to the right because i can use my right hand which isn't holding the seat to lean over before i make the jump.
I use my right hand to click the 'Advanced Search' option, and then both hands to search. Both of my feet are normally extended in a comfortable-type position on top of a chair, which I find greatly affects louge height.