Great thread!
1. Mainland China
2. India
3. St. Petersburg
But as a person with AIDS, China & India are out of the question - healthy people go there and come back sick!
On the other hand, it's nice to look through other people's lists and realize that I've been to more than half these locations since I stopped work 6 years ago. And of those I've missed, quite a few are still in my plans.