I've seen some amazing BB tanks and my OCD tendencies go off the meter when I look at how clean and tidy they are. Anyone who has been to my flat knows how spotless and tidy I keep my home. The japanese take their tanks to another level with their BB setups and the acros in those tanks do so well with the low nutrients.
On the other hand, I love the amount of and diversity of fauna that having sand allows. I feed at will, as my schedule does not allow me to stick to a regular feeding schedule. Because of the biodiversity in my sand and the DSB in my fuge, my tank feeds itself. Plus when I stare at teh tank, I love finding new worms and pods crawling and zippying around. For me it's not just about the fish and coral....it's the whole ecosystem that keeps me engaged and my tv off.