I just love white interiors. Have always wanted a cute little rustic beach cottage I could decorate all in white. I know it often sounds better then it works out in reality, but rustic allows for a few imperfections.
The most effective is to play with the dark and white, and the best use of the dark is in wooden furnishings or floors. A friend of mine has recently renovated her home, and has put ebony wooden floors thoughout her house. And with off white furnishings, kitchen and cupboard units, just the perfect look.