i also agree on one of the previous posts, ricks are nice, the color variation is great and is a mushroom. leather corals are nice, easy to frag, but shed a slime once in a while which seems to collect in my tank.
if you visit bluegrasscorals.com you can get a great picture of the variety, however there prices are crazy, mom and pop stores seem to sell corals at a nice cheap price which is where i get my corals. but just check out different corals and get a feel for their colors and what you plan to do, would you like a coral to just sit in one spot and look pretty or would you like a coral that will grow and spread?
im going to personally attempt to make something uneaque. i hope no one steals my idea commercially but im going to attempt something , i dont think its been done before but if it works out then im sure it will be a big hit in the aquarium world. ill get back to this in a few months.