Tokyo (and Japan) is on top of my list! Been there twice. Love the country, the people, the food... everything... Been to both Hakodate in the north and Kyoto and Hiroshima further south, but Tokyo is the favorite. We are even planning on moving to Tokyo for a period!
I also love Barcelona, Seville and... London and UK. UK is like coming home for me as we lived there for a year. I visit London 4-5 times a year and I never get tired of that city.
The most exotic place must have been Hawaii.
Xxx.