Biased, but Nordics. Obviously in terms of music, athletes, actors, movies, entertainment etc there are better countries, but overall the culture, way of living, values etc are some of the best IMO. Out of Nordics I would give the upper hand to Denmark or Sweden(some problems) followed by rest. Netherlands and Switzerland are up there as well. Like for example US is good at entertainment like music, movies, games etc but they also have a lot of stuff I don't like. Canada is pretty good, its bit like mixture of US and bit of Europe(mainly countries I mentioned).
Countries like Japan and South Korea are also good because they have a lot of own stuff and wouldn't have to be as reliant of other countries for entertainment etc, but they also have problems like some mentioned really high working hours, social pressure, and overall you need to work hard and success or you are seen as failure. Pretty hardcore culture.