I don't think anyone has to justify why they have chosen a certain piece of kit to compliment thier hobby. You do need to understand them and look after them, yes they require maintaining and preparation but its something i don't mind.I happily spend and hour the night before checking and building the KISS, it doesn't seem that much hassle to me.
i enjoy the silence of the dive and the feeling of this is how diving a should be, its quite nice to be able to hear the noises around me while i'm diving, don't know why but i find it very relaxing. Knowing as i swim along the wreck i have no problem extending the dive by 5 or 10 minutes if i want (i always keep a mental check of max time for bailout), the only real limiting factor on most dives being bailout and boredom on the stops. The warmth of the gas compared with OC is a joy, coming up the line and looking around at the OC guys going from one reg to another and smiling to myself. On a good weekend at the end of each day, cleaning and tidying up my kit, check the gas and wonder off to the pub, watching the OC guys giving each other bottles to take to be filled.
this is what makes me enjoy CCR diving and want to dive CCR every time.
With money you can't buy wisdom, you can't buy inner peace. Wisdom and Inner peace must be created by yourself - His Holiness Dalai Lama.