Been pillion for over 35 years. Various bikes (HD low rider- travelled 8/9 mths USA in 1984, try siting on a 6" square for 25,000 miles and see how your backside likes it. ) MGuzzie like sitting two up on an ironing board, BMW Pari Dakar, and our current Bike Honda Africa Twin. My view is a back rest is imperitive - not to lean on but more as a brace for those unexpected moments for excellaration or sudden change of direction. Can be a weapon when riding over rough/pot holed roads). Good protective clothing is a must. In 1984 we just had open face helmets, jeans and leather jackets. No such thing as water proof clothing back then. We improvised with snow gear over the top. Still no such thing as Water proof gloves. Also after recent accident SO PLEASED we wear our good riding gear no matter the temp or how uncomfortable it is - it's what saved us some serious injuries (no thanks to the car driver whom took us out). Hubby also modified the Honda to make it as comfortable as possible for both of us. Custom seat for longer rides, original seat found me sliding into his back all the time). Extra rear suspension to handle the extra weight, especially for the odd off-road experience (inevitable on our RTW adventure. As for luggage. Soft panniers to reduce the risk of physical damage - particularly my legs for when we topple on the off road bits (and it's happened) The less you take the better. I don't do make-up, Not a fashionista-never have been. We have a Sena com system, supposed to be the bees knees designed specifically for our Neotech helmets, but we found it so frustrating to use we just don't use it. Back to the old way of comminication. Shoulder taps, squeeze the legs etc etc. Good comfortable boots, again ours protected us in the accident and are reasonably waterproof. We are doing some miles in some pretty heavy rain in SEA at the moment. Like others we generally have one pannier each and a top box for camping gear and other belongings that can be locked. In the long run you have to work out what's best for you-some people are good pillions others not.