My wife has talked about the plain white walls in our bathroom for a while. We considered wallpaper but that was a no go for me, having stripped wallpaper a whole summer in my youth
. Hanging a picture has its own problems.
Eventually she found these beautiful removable decals from
www.uwdecals.com. They are a sort of dark, shiny aluminum color, which is a bit hard to capture in a photo. We are pretty happy with them. For us, it feels like the silver color complements the aluminum interior without being overwhelming. UW also has many other colors and styles to choose from.