I think some people ware them well and look fabulous(plain vest top and flat sandals). I've tried on many pairs simply because I like the pattern and I look hideous. I've actually laughed at the mirror, they do nothing for me.
The printed harem trousers I have are tapered so slim at the ankle, I wear them with plain fitted t-shirts, vest tops and flat sandals or converse if chilly/wet. Also wear a jersey blazer or biker jacket if needed.