Originally I am from Eastern Europe, and I lived in the UK for a while. Positive: I stopped smoking soon after I moved, as the price of cigarettes in UK was crazy high. Negative: I gained some weight, as I very much enjoyed local chickens, burgers, bacon, beer.

Jokes aside, it helped me to improve my English, see other ways of living, experience different work culture, and learn that very indirect, not straightforward way British people communicate.