I did that once for a relative - after several years of birthday and Christmas presents that looked as if they were ones that they had recycled, I knew that she positively hated dark chocolate. Made up a hamper of all different bars of dark chocolate (with chilli, orange, rum etc) put it all in a nice basket that I had laying around, cellophane, tissue paper, ribbon, the lot and sent it over with another relative that was taking presents.
The next day I had a really excited phone call from the recipient saying how much she loved it as her GP had told her that if she was going to eat chocolate, dark was better for her than milk , and how did I know???? Doh!!!