Lolol so many people saying Japan but you realise life there isn't as pleasant as you may come to expect from watching animes/manga
In my opinion its a really nice place to visit but living there can be hard, especially for foreigners. Even if you were born in Japan, life can be tough due to huge societal pressures and the workaholic attitude most people have. A lot of people there pretty much work all day and have little free time.
Just my opinion
source: I'm Japanese born in Australia and have visited many times
OT: Australia is nice but sometimes boring, so maybe somewhere in Europe or America