Been watching many shows focusing on burgers. Lot pre grind meat and add special made topping and flavoring spices sprinkled on top when cooking but none seam to add flavoring directly to the chop meat mix. They have done this with other meats through rubs or soaking but not burgers. Does anyone here flavor the meat or do you like it in its purest meat taste and leave flavoring as a addon. Not even stuff burgers seam to alter the meat just stuff inside it.