Something a little humorous, theatrical and fun. While homes should be practical they should defiantly have elements of fun, if nothing else but to break up the monotony of every day routine. Something a little different to make you smile lifts the spirits, and we could all do with a little of that I think.
Maybe some of these interiors are not to your taste, however the principle is still the same, have some fun. There are rules I am sure you should follow for 'correct interior design'. I am not sure that I follow any, I just know what I like and I am brave enough to have a go.