I'm also a Brit living in the US, and honestly, I'd say just have fun with it in return. I have, variously:

- Told people my name is Rupert, Tarquin, or Archibald (no-one will question it for fear of sounding rude- doubly so because they think we're very particular about manners)

- "Where are you from?" "Iowa." "Oh..."

- "Harry? Oh yeah, good lad. Bit racist but what are you going to do"

And so on, so forth. I certainly don't begrudge an interest in all things British, because it's preferable to the situation Americans often find themselves in when abroad, where they're considered cheeseburger eating morons.

Just think- they could all be asking you when your last football riot was.