What are the best type of fish and decorations and plants to have in a Feng Shui aquarium?

I don't know if your familiar with Hagen/ Fluval products but they have a line of tank called Chi. These are feng shui styled tanks. Here's the website which you can browse through there available products and tank set-ups, maybe you'll find some inspiration. Goldfish such as small comets and faintails are always great for feng-shui. I've also seen Tropical Chi's with Mollies and Platys in them as well. The world's your oyster really, as long as the fish are a small breed and you don't have too many in there.. personal favorite would be the long-finned mountain/ white cloud minnows.