If I put a lot of things it looks globy. A. Get a theme in the room. Make it a gazebo and have the space directly across from the 'water closet' be the opening into a beautiful meadow or garden. Hang a window frame on the wall directly opposite the 'water closet' and place a print of some beautiful flowers or something behind it. Add some furniture.
People are afraid to use furniture in their bathrooms.
Put a narrow table with some fun things on it. I personally think getting a theme and using that is the best solution. Bathrooms and powder rooms should be fun and different. I have a large three bedroom apartment and would like help decorating it. I love clocks, mirrors, pictures, and swags.