Well, I knew it!
Berlin is of course in the top 10 cities! I predicted that everyone I know will be living in Berlin by 2012. I think it can really happen.
The top 10 are:
Auckland, New Zealand
I personally have been to over half of these places, and can say that I would love to live in all.
If I could add to the list I would definitely add :
San Francisco, California
Feel free to add your favorite city to the list!