Most I've seen on here, including my own, are on the bottom. I believe in the wild, they're usually found growing on the substrate rather than on ledges and rock close to the surface.
I've seen some crazy nice ones on here. Mine's very average. I leave it on the bottom with light flow going over it and it's always been a struggle. Always some part of it lightening up and it rarely extends much for feeders. Looks great under the actinics though.