I too usually detest fat unless it's crisp. Yesterday I posted a picture of some Dongpo Pork which I described as "beautiful". I meant it looked beautiful, but I certainly didn't eat it. It is just wobbly pork fat in a barbecue sauce, if you want my honest opinion.
Yet, I love bone marrow. Although I agree with @TicTac above. It needs a sharp accompaniment. At some point this year, I plan a visit to England and will be heading for Fergus Henderson's St. John restaurant for his roast bone marrow and parsley salad.