Lots of people want to go to another country. Whether or not that is an option, at least in the Army, depends heavily upon what kind of doc you are. For example, I could get stationed in Germany. All I have to do is stick around until O-6, and then if I'm lucky and my consultant loves me, it's a done deal.
That being said, I have friends in other specialties who went to Germany on their first PCS.
I think the important point is that if being stationed at one or a few places is of primary importance, the military is probably not a good idea. Maybe you'll end up there. Maybe you'll end up someplace God has forgotten.