In general, the more Meat you expose to rub and smoke, the more of those flavors you get. Whether you remove it is your choice. With lean meat like brisket or loins, I leave the fat and score it. Lean meat needs all the fat it can get for protection from drying out and the added flavor. Fattier meat like shoulders and butts, I remove any skin and fat to expose the meat. There is plenty of internal fat for flavor and any cap fat is not needed. Now if I am rushed or being lazy, the meat goes in as is and I decide what I want to keep or remove at the end...JJ