This also handily serves as a Community Crash Course for the personality who has just arrived and wants learn about the his new home as quickly as possible. In some areas, it's a hoagie. In others, it's a submarine. And in other parts of the country, it's a grinder. What breads are served in local restaurants that you see less frequently in other parts of the country.
Many areas have their own special ways of preparing French fries or chicken wings.
Some like it hot. What Americans call a subway, Londoners call the Underground.