Almost any kind of Italian sandwich involving real salami, provolone and Italian bread
Reuben
Tuna salad on wheat with red onion and dill pickle (I have half of one of these every school day for lunch with some soup)
Leftover meat loaf w/ mayo
BLT

I have traveled far and wide, but I have never once eaten a real Philly cheese steak sand and would like to. I'm betting it would replace one of the faves above with no trouble. Down here, there's no such thing. The meat they sell universally in Texas sandwiches is barbecue.