I've been using Snapper 21" for as long as I've worked. My mowers are old - if that matters today - so they have the "drive mechanism" or thumb drive (if you have a sense of humor) on the right side of the handlebar. Years ago, it occurred to me that by going in a counter clockwise position was most efficient because the left hand never had to leave the bar. Over the years, especially when mowing the meeting of the turf with the payment, it seems that clockwise tends to cut the grass differently due to the direction the blade spins. Maybe I'm wrong and of course will stipulate that a flat lawn meeting a flat service is different than a curved lawn meeting a flat pavement, but still, I feel cutting counter-clockwise is less hard on the grass closest to the curb/walkway/driveway/etc., than cutting clockwise. So... For those using 21" mowers, do you find that one method is harder on the lawns' edges than the other or not? Also, do you find, especially if using mulching blades, that less grass is left to deal with doing one way or the other? For what it's worth, I'm predominately right handed and feel I have more control over the mower - especially on any kind of slope - than I would if I were mowing clockwise. Further, virtually all my lawns are St. Augustine, so maybe if the type of grass matters, you now know.