Thanks for the comments.
I bought a blue/black background last night. Since it's 4 inches off the wall and filled with 800 lbs of water, painting is not really an option. I'm going to see how each looks.
The rock was spread out before and we definetly like it better where it is. There are a lot of hiding places in there. Even one that the puesdochromis can get in that no one else can. It has made that spot a home. There is pretty good room behind the rock and pretty easy access. The tang can even get back there if he wants.
Plans are to continue to cover the rock with colorful coral and/or anemones. I would like to get a blue hippo and a porcupine puffer, but it's not reef safe, so I don't know.
It's 90 gallons. 6 feet by 1 foot by 2 foot water depth. I'm starting to see it going somewhere and am excited about it. Wet/Dry sump and seaclone skimmer. Have some ideas for improving the sump, but not sure how to implement with the equipment I have and the space I have. RO/DI filter is due in today, so once it's working I will start making water changes. Bad algae problem from tap water. Newbie mistakes.