Having worked at KFC for 3 years during high school and junior college, pass on the KFC gravy. The crack like secret ingredient is fried chicken grease/cracklings from the bottom of the pressure cookers collected at the end of each day and saved for making tomorrow's gravy, FYI (at least circa 1979-81 when I was doing it).
Last meal would be thin crust pizza with pepperoni, sausage, black olives, mushrooms, mint chocalate chip ice cream for dessert. An assortment of beer to drink (Anchor Steam, Boddigton's pub ale, Duvel, Newcastle Brown Ale)