Today I delivered some items to a company, and whilst the owner was writing a cheque his assistant signed for the goods. I looked at his surname and asked if it was Romanian. He looked shocked for a second, then broke into a big smile. We spoke for a couple of minutes and then he asked how long I'd been living in England. He did the 
face again when I told him I was born here.
Tbh, this isn't the first time an Eastern European has assumed I'm an immigrant. But every time it does it makes me feel good about myself, something I don't often do.