Ok, when I lived in FL I was told that you guys have a different kind of milk in your chocolate... and wax is added?! Anyway, I think this is what causes the differences.
Ooh lucky you getting a care package. Well, if you like mint then I recommend asking for a Dairy Milk with Mint Chips bar. Those are yummy! Also you'll want a couple (at least!) of Dairy Milk with Caramel. Crunchie's a great and pretty different to anything you can get over there I think. And recently, after a lot of public pressure, Cadburys brought back a bar which is very popular but which the stopped making a few years ago.... it's called a Wispa and has little bubbles in *kinda* like an Aero but much smoother and jsut - yum! Hope that helps and have fun
Oh, if you just want some mints ask for Trebor Xtra Strong Mints, those are lovely - but strong! lol.
Cya,
Gaspode