Hello,
You know lol :) that question could take me all day to write out:). There are sooooooo many that look amazing on the sandbed. There’s are ultra scans, scolys, tracs, chalices, softies, plastic fake stuff from wal mart (just kidding), bubble coral, plate coral, tons of coral.
Mmmm maybe you can research the types of corals that spark your interest. Then make a list and do a pool and see what most others think. You will have to narrow it down, or your poll won’t be a page it will be a book series volumes one to a hundred. But hope this helps and when in doubt if it’s beautiful to you in your eyes, then by all means.