I would definitely vote for my country but if every one does so that will not be interesting.
So I'll give a different answer.
I would say I'd like to be born in France. French people all learn philosophy which helps them form their own thinking. In comparison, philosophy is an esoteric hobby in China. Besides, after watching some French movies, I was mesmerized by the tranquil and pleasant country views.
I´m so grateful that my parents choosed this country to live,or in fact,the circumstances brought them here,and I ´m proud of being Uruguayan, and just can´t think of another country.
And an Uruguayan passport is enough for me.
To me, the most important thing is the passport:
If you have an EU passport, you can permanently move to any other EU country without even having to apply for a visa (just a few exceptions). You can even move to regions like Hong Kong, Taiwan or Malaysia for up to three months without needing a visa.
That's why I'm really grateful that I've been born in the EU and have an EU passport. A US passport would also be fine with me. China is a great country, but Chinese passports are inferior to EU passports when you're travelling abroad.
I don't know, I like my country but I would rather to spend some times in some isolated island in the ocean.
I'd choose Australia to live in because of the beauty of nature, green land, kind and peaceful people, non crowdedness and the big investments opportunities.
Just for the benefit of the passport I would choose an European country because a Colombian passport holds you back from many opportunities abroad.