What does it say about me when over half of these apply, but I'm American?
Anyway, I'd say...you know you're British when you go some place like France for the weekend.
Seriously, the fact that you have the option to go to another country just because you want to is pretty sweet. For me, at least, it's a big ordeal with lots of prep time involved. Though, I suppose going from, say, Oklahoma to California is almost like going to another country...and yet, the point about money and prep time still stands for me in that senario.