Brussels, Belgium - wet, cosmopolitan, multilingual, dirty, fun
I worked in Brussels and had a really good time, the countryside around the capital is also really lovely, it's constantly got something to do so you won't get bored, but it's also quite relaxed compared to other capital cities, so it's not as overwhelming. Polish your beer-drinking skills and never, ever leave your umbrella at home... Check out the Eurotrash group on Facebook too, great nights and events organised by a group of young professionals :-)