Structural purist, ingredient rebel - there are very few savoury foodstuffs that aren't significantly improved by being stuffed inside a sandwich as anyone who has had the pleasure of a pie barm will testify.
I wanna say Im a Structural purist, ingredient rebel. Its a sandwich when food is sandwiched between 2 other pieces of food. Its not a sandwich when you use a roll, a taco, a wrap or anything like that. But I wont get upset if someone says Subway make sandwiches, not sure why but that seems to be the only exception to the rule to me.