I've given this a bit of thought. Drive side/Non drive side makes sense for power train components whose position relative to the drive side is relevant to their construction or function. So: Drive-side crank tells you more than just saying right crank, because it tells you about the presence of the spider, rear wheel drive-side spokes are (I think) subject to different stresses to non-drive side. However, outside the power train it makes less sense - for example "drive side brake lever" or even "drive side pedal" seems a bit silly.