Motorcyclist, Right Rear. From riding motorcycles I tend to operate bikes right handed. My left hand I'll use to adjust lights with, ring bells, wave at the girlies. When I need to stop for whatever reason, at whatever speed, both brakes are usually used. If one hand is off the bars I want the rear engaged first, because the rear doesn't affect steering or balance. It starts to scrub off speed immediately and slow the bike in a straight line. It's just a split second before I've got both hands on the bars and am using two brakes to stop anyway. I use suicide levers also, because I always like to have my fingers on the trigger.