I don't know if I'm the only one with weird sandwich layering hangups, but this is how it's gotta be. If not, I will straight up take the sandwich apart and rearrange it before I can enjoy it.
If the sandwich is cold (top to bottom): Condiments (No Mayo!) Cold stuff (like lettuce, pickles, etc...) Meat Cheese
If the sandwich is hot (top to bottom): Cold Stuff Condiments Cheese Meat
So help me god if someone puts lettuce, pickles, and other cold stuff on the bottom of a sandwich, hot or cold. Either way, flip a sandwich around and see what you want to hit your tongue first. It really changes the whole sandwich-eating experience.