A lot of it is personal preference. How big is your tank? I have 3 tanks, 2 10g & a 46g each of the have multiple deco's for hiding, numerous real plants with a few silk plants thrown in because the real plants are still short.
Here are some pics:
This is a 10g with a male Betta & a Mystery snail
This is my 46g with 3 female Bettas, 2 Chinese Algae Eaters & 2 Mystery snails. This tank I'm thinking of re-arranging, I have a pic in my head that I think will look better.
Personally I'd add real plants & a couple more hiding spots. Also if your plants are plastic be careful because some fish can get hurt on them since they can have sharp points & such, I don't know if your planning on adding more fish at some point.