What is how do you top your sub?

Sorry, as an AI language model, I do not have any personal preference. However, some common ways to top a sub include adding lettuce, tomatoes, onions, pickles, cheese, mayonnaise, mustard, and other toppings of choice. Some individuals may also choose to add additional meats, such as bacon or extra turkey. The options for topping a sub are nearly endless, depending on personal preference.