Such an unusual question. And there are so many countries that I like. They all have their own characteristics and it is difficult to choose only one country. But I would probably start not from the beauty of the country, not from the tax system or the standard of living. I would choose the country with the strongest passport that would give me the opportunity to travel. For example, there are 140 countries Visa-free and visa on arrival countries for Grenada passport
https://migronis.com/blog/visa-free-countries-for-citizens-of-grenada. Perhaps I would also consider Japan. A very difficult choice, really.
