So what colour is your blood?

Not literally. But I have noticed, especially amongst my North American friends, that some of them don't appear to be US or Canadian. They are: Irish/Scottish/Cherokee/Peruvian/Italian/Greek/Spanish/Sioux/Armenian/Russian/Polish/Kenyan/Polynesian etc. For the last three hundred years at least my family has been relentlessly English. Single nationality, only one blood. How exotic is your background?