Once again, it's about balance. If your bedroom falls into a "wood" sector, that doesn't mean you don't have any of what would be considered "fire" colors or elements in it. You just don't want that to be the dominant theme or piece there.
It's like your four "not so great" directions - you are still going to activate them in regards to the space feng shui of Levels One and Two.
Much Love, Shawn