On aquascaping, what's important is that you like it, that your livestock has enough room to grow and thrive, and that you have enough flow to prevent dead spots.
I used PVC pipe to form the basis of my aquascape to keep everything as open as possible -- helps keep flow moving everywhere and allows bigger spaces for fish to swim in and through. You can see a few parts of it in the photo below, but soon it will all be coraline covered anyway -- this is 13 weeks now and the coraline has already taken over...