I love a good Reuben. I have to admit that I like ketchup on them. Not as easy to find here in Va as in Ny though, I think mainly because of the lack of diners here.
Another is liverwurst and onion on rye with mustard and mayo.
Love a good ham sandwich with thick slices off a baked ham -"city" or country ham.
Lately I’ve wanted baloney and american cheese on wheat with mayo and mustard, occasionally with lettuce.
I’d add a hamburger and barbecue sandwich but they seem to be in a different category to me.