[SFSpike]

1. Paris--all of Europe in one city...never had a bad time there, and the food is amazing.
2. Budapest--simply beautiful and attractive, nice people. I definately knew I was on vacation there, it seemed exotic yet familiar.
3. Antwerp--underrated, wonderful city on the Schelde. Again, great people and atmosphere. Have many good memories of times there.

Europe has so many wonderful cities that it was hard to make a choice. Really like Italian cities as well--bella Italia! Guess your own experience in that city will determine if it remains your favorite. No matter how lovely a city is, if you had a lousy time, that's what you'll remember.