I have always liked a dark colored room... my mom wanted to kill me when I painted my bedroom dark navy blue in high school, but I loved it! Obviously you don't want your entire house to be super dark, but having a room or two in a dark hue can be quite fabulous. One color that I adore on a wall is graphite. Most shades of gray look pretty great, but graphite is a favorite because it is so versatile. It can be handsome in a man's office or glam in a woman's dressing room. Also, it is a color that makes wall decor, like mirrors, really stand out. As you can guess from my home wish list, I like mirrors a lot :)
I also included a few shots of rooms in lighter shades of gray that incorporate furniture in graphite tones.
Would you paint your walls in a bold color like graphite?