Don’t forget the ceiling. White ceilings are about as interesting as a blank sheet of paper. Use any number of interesting options to dress up a ceiling; wood beams, wood planks, paint type, color, various dry wall texturing techniques, wall paper, upholstery, formed Victorian tin squares, glass or tile mosaic. The choices are only limited by your imagination.
Do use a variety of textures to add interest to the room, including wall texture. Use crown molding to define the edge of the ceiling and wall - and to add character.