What is your budget? If no budget concern probably Switzerland and Netherland in the summer and New Zealand in the other summer.
Realistically, since wife is from Taiwan and we can fit in well culturally, maybe Taiwan for retirement in a less crowded area, or maybe Costa Rica if we want to be near the nature every day. If I can speak Greek maybe a non tourist island too?
If it is by myself, with no children, no spouse, just staying at home all day, and eat out a couple times a week, I do like Macau quite a bit, and it reminds me of home back in my youth in Hong Kong.
We hate super hot weather so Singapore, Malaysia, Thailand are out (I love vacation there for a week but not melting away my life there). Wife can't stand anything colder than San Francisco so many places are out (probably half of Europe). Despite no politics I do think political stability and safety is important, so many questionable places are out too (on every single continent).
Japan would be interesting until you know how stressful they try to blend in, "The nail who stands out must be hammered down" is real.