I think moderation is the key word here, I remember some many many years ago when I decided to wallpaper a wall in our bedroom with a large scale pattern of harlequin. It was not the cream and white but a pure black and white which was quite a statement in our small bedroom. My husband use to say that he had to put his foot on the floor for a few seconds each morning before he got up just to stop the room from spinning. So if I have learned nothing else in all these years its that my decorating style has not changed but has matured and I have come to appreciate moderation in bold patterns.
Here are a few of the touches of harlequin I have around the house. Just a touch in a some rooms but becoming a collection none the less.