there was a fantastic article in the Economist last year about being an expat.. the yearning to be an expat the pluses/minuses, etc.
cultural clashes and surprises shouldn't be big surprises, one should read up on the place where they're thinking of moving to.
I could've easily foretold the difficulties that the Italian would face in Sweden for e.g. even though to a lazy observer, it would seem like a no big deal Europe to Europe move.
yet.. Latin Europe can be radically different from Germanic/Northern Europe.