What Are Your Fave Hoagie/Sub Toppings?

I'm sure this has been covered before, but I'm making subs/hoagies tomorrow night, and would love to play around with toppings. I tend to use: lettuce, tomato, onion, pickle, kalamata olives, banana peppers and oil and vinegar. Sometimes spicy mustard instead of oil & vinegar. I am not a big fan of mayo, but I am always open to suggestion with condiments and veggies.

I am starting with a good, fresh sourdough roll, and the lunchmeats are pepperoni, ham and genoa salami. Cheese is thinly sliced provolone. Any suggestions or favorites are welcome:)