A plain wall doesn't have to be plain anymore.  There are so many creative ways to turn drab into dramatic, boring into brilliant and small into spacious,  by using one of the hundreds of Faux Finish techniques. 

Looking for an old world style?   Try Venetian plaster with a deep color wash.  Or perhaps a patina effect. 

A simple half bath can be transformed into a truly elegant Powder Room with metallic faux effects.

The possibilities are simply only limited to your imagination.