I am a southpaw and Most of my Lambs Woolly Production kilts are left hand pleated.
I don't think I could pleat a kilt with right hand pleats any more.
The last kilt I made has double box pleats so I did got to do both in one kilt.
Some time ago I had asked about lefty pleats and someone mentioned that there might be less pleat wrinkling while getting into the seat of a left hand drive auto. Well I can say I have found that this is correct..