Over the years I've went from Crshed coral bottom, to DSB, to BB, to SSB, back to BB, now I'm back to medium sand bed.
It all depends on your reasonings. BB is great because it allows for a much cleaner tank and super high flow rates...both of which I don't need. I have LPS, softies and xenia which all like nutrients in the water column and high flow would tear their flesh. I also like the nitrAte reduction of the anearobic bacteria that live in the bottom 2" of the sand bed... with a BB my nitrAtes were around 10ppm (sometimes 15ppm if I skipped a water change) now they are 5 - 10ppm and dropping. I also like keeping sand loving gobies
and the look of sand is pretty..... those are my reasonings for switching back to a sand bed.
My 3" sand bed is now a few months old. I switched from BB to a sand bed for several reasons (noted above) knowing all the while that the mainteance would increase. No problem! I simply stir up the top 1/2" during water changes and vacuum up any diterus that floats out (keeping the siphon tube about an inch above the sand to prevent sucking up sand). I also have a sand bed cleaner crew (nassarius snails, certith snails, conch, and gobies). I had a slight cyno bloom at first but now my sand bed stays clean and white.