Specialty Gardening: My very first Dish Garden, 1 by Zanymuse

Zanymuse wrote:
I found this large plastic dish in the trash at the curb and rescued it just as the truck was coming. It was a light cover from a round light fixture and measures 22" across and 4" deep. I cleaned it up, drilled holes in it for drainage and filled it with a layer of pea gravel topped with a sandy cactus mix potting soil and added some cactus and sedums and pregnant onions. Then set in some local rocks. My very first dish garden! I don't think it looks too bad but it seems to be missing something to give it that special look...any suggestions?