I think we all have more than one and it depends what you're looking for! Greek islands to dosconnect, Sweden to retire, Costa Rica to be one with nature, Spain to live as an expat...
The US or Indonesia. Why? - The people and topography/diversity. For both their amazing, and not so amazing traits, I came away with some indelibly, vivid memories. I'm also very drawn to The Old Silk Road in Central Asia.