I would love to move back to Munich as I heart my hometown. I would also be interested in living in Berlin or another big city in Germany, though. I would prefer not to live in a small town, that's really the main thing I care about. No more small town. Heidelberg is pretty small, and I think if I was not a college student and if Mannheim wasn't right next to Heidelberg, I would not enjoy living there nearly as much. I just miss the social events that life in a big city offers.
But if somebody offered me a job in San Francisco, you bet I'd take it! I loved that city.