The first lesson is that as soon as you think you have your aquascaping figured out.. you will want to change it
You just need to find what works for your tank and your stocking plans. I have an internal centre overflow in my 90 so I had to work around it, but I think I have what I want now.
I agree that it is good to have spots that your fish can swim through and hide/sleep in. Also depending on your stocking plans be sure to make lots of ledges and nooks to tuck in corals.. especially if you are going SPS as they seem to be on big *** plugs as upposed to the small little aquacultured rocks I always used to see.
My photo skills suck but this is what mine looks FWIW
