Clowns tend to like flowy corals that move with the water, at least from what I've seen. So anything like a torch, frogspawn or a leather, heck, maybe even xenia. LOL Mine used to host my auatralian elegance until they near about killed it and I had to move it. You alos have to watch out for sharp pieces on the corals so that your clowns dont get nicked if they do host.
To be honest, it was cool to see the whole hosting thing, BUT it does get old pretty quick. My clowns pretty much never left the elegance so it really cut down on their "display" time.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.