You're kidding me, right?
You're in the hoagie (not sub, not grinder) capital and you're considering going to... gulp... Subway?
We've got some work to do, Spanky.
First, THE ROLL. Subway is so confused about how to do it right, they have to helplessly offer about six different kinds and hope you know what to do. Well, we figure that if you're paying for a sandwich, WE should have the know-how. A hoagie roll should be just soft on the inside to soak up the special hoagie sauce, but just hard enough on the outside to not get soggy. Ideally, the roll is Amoroso's or Liscio's.
Next, THE FILLING. Although fillings can vary, the most common is an Italian hoagie. Of course, Subway thinks, "Hmmm, how do you make this again?" while an authentic Philadelphia hoagie contains salami, ham, cappicola, and provolone. It comes with lettuce, tomato, and onion, and salt, pepper, and oregano, so be sure to say if you don't want it. Also, note that the roll is first prepared by tearing out some of the soft bread and sprinkling magic hoagie sauce on it. Some people have mayo. I believe that some people think that you can never die young enough. These are the same people that finish up their order with, "Diet Coke, please."
But I digress. You can get other kinds of hoagies, from a tuna hoagie (tuna salad with lettuce, tomatoes, and onion) to a cheesesteak hoagie (lettuce, tom-... well, you get it).
Finally, how do you find a hoagie? Well, if your only choice is Subway and Wawa, flee to Wawa and order an Italian. Make sure you ask for lettuce, onions, and tomato and salt, pepper, and oregano if you have to use those little computer screens.
Otherwise, ask around for a decent hoagie place. Everyone has an opinion, and it's tough to find a bad hoagie... unless you go to Subway.