I love this post! So many of these sandwiches I really love. The ones I haven't tried I will have to know.
I too love scrambled egg and ketchup on a sandwich. My peanut butter and mayo sandwiches have to have Blue Plate on them. I also love peanut butter, mayo and banana sandwiches. Mayo and dill pickles sandwiches. No one mentioned tomato sandwiches so I guess tomatoes with mayo isn't weird. I love to take one piece of white bread put mayo on it, pb on the next piece, pringles potato chips in between those two slices. On the back side of the pb slice put jelly, pringles again, then pb on the next slice. A triple decker. OH and I also love just mayo sandwiches as long as it's Blue Plate mayo. That's always been a comfort food of mine. I love pineapple & mayo on white bread.
Can't wait to try some of the other ones ya'll have mentioned.