suggestions for a theme for my 90 gallon

[corpusse]

Sadly a couple weeks back my Octopus passed away. This means I have an empty 90 gallon (36x24x24). Prior to the Octopus I kept dwarf cuttlefish.

I could get another Octopus but I'm leaning away from another ceph for now. They are a lot of fun, but lifespan is so short plus it can be very difficult to obtain a young enough one that will live for a while.

I already have a mixed reef and a pico tank.

So I want this tank to be a theme, be it dominated by one particular species of coral or type, maybe non photosynthetic, maybe but unlikely sps dominated.

There is nothing in the tank but established live rock and an inch or 2 of sand. I currently do not have a lighting fixture for the tank and used 2 old pc fixtures to take this photo of the new aquascape, but there is a bk mini skimmer.

I'm just having a hard time deciding which direction to go. I'm all over the map thinking predator fish, or a lot of small fish, sps, nps, whatever.

If anyone has any tanks that might serve as inspiration please post.

comments on aquascape are also welcome I've already redone it twice, I guess I spend too much time trying to decide what to do.