Vienna has been my favorite, however I have always wondered how I would feel if I returned. The old saying about you can never go back. On one return trip I was with my father who had been stationed in Paris and it was so sad for him to see his favorite haunts gone. He never said, but I believe he wished he hadn't made that return trip, and had just kept his memories of the way things were. My second favorite place was the Neuschwanstein Castle, which isn't a city but a place I would return to. Sometimes travel memories are made special with good company. When I look back I can clearly see how my travel experiences have evolved. So there again, I may choose never to return to my favorite and just keep my memory. I have been lucky to have seen some beautiful places and I still have lots of places I hope to visit yet and I'm open to finding a new favorite. That's the fun of travel.