Asking a question like this is similar to me asking you for advice on what color to pick as my favorite.
Everyone will have their personal thoughts as to what type of tank they like. Me personally, I wouldn't bother doing a tank without live plants and would never use fake decorations. But that's just me. As long as you line how the tank looks what does it matter what decor you have!
As for general tank things I would suggest a black background and a sand substrate. The sand will make the tank easy to clean while the background will make all the colors in the tank pop.