As I've said before, there is nothing as satisfying as a white bathroom. This example by Paul Vincent Wiseman from the book House Beautiful Colorfits the bill nicely. I especially love the use of frosted glass at the window (instead of fussy curtains) and echoing these with mirror around the tub makes for a great enclosure.
White doesn't date; this photos spread is 20 years old but, in my opinion, is timeless. You can't miss with the classics!