If ever there was a perfect place for pattern--the bolder, the better!--it would be the bathroom.
The bath is a room where one does not spend a great deal of time (unless you are like me, and you are in the "high maintenance" category...ahem), therefore it is the perfect room to decorate with a fabulous eye-catching pattern.
Whether using paint, tiles, or wallpaper, covering the floor, an accent wall, or every wall, you can create a bathroom which will be far from boring. If you are afraid to use too much pattern in the main bathroom, you could just do the powder room instead, which would be sure to wow your guests.
Be brave! Be bold! Bedeck your bath with pattern!
(Cue dramatic music, and fade-out...)