/BW tanks, I use silk plants (amazon swords and hygrophila) and realistic looking driftwood. These silks plants are amazing because they move just like real plants and look more realistic than plastic. I never worry about tannins, lights being left on or not, pieces of plants messing up my power filter intake, etc.
BW tanks are better off with all fake decor (except for real rocks). Very few plants can live in BW and driftwood will slowly rot.
tanks I am willing to use very few fake decor.
edit: I didn't mean rot, but deteriorate.