I lived in Klagenfurt, Austria for 16 years. The surrounding nature is gorgeous, the access to bike trails, hiking trails, etc. is great (no need for a car for most trips), it's close to Italy and Slovenia (a hidden gem in Europe most people don't know about), and the social system in Austria is great. Klagenfurt is a small town with a bit of an inferiority complex and the people can be somewhat provincial, but it's just big enough for my taste (a bit of nightlife, enough a cultural events, art, live music, good food, etc). However, I'm not a big fan of winter (Unless I'm not snowboarding). The weather is the main reason I moved back to California.
I also lived in Tapachula, Mexico for a year. That was an amazing experience, but that city is not where I would live. I would consider Belize or somewhere else in Mexico though. The Mexican people are so friendly, the food is amazing, and the sub-tropical climate down there was amazing! (climbing volcanoes, white water rafting, hiking to fresh water sources, beaches next to mangroves, etc.) Also, it was great to be able to travel to Guatemala so easily. Now that I have kids, I don't think I'd live in Guatemala because of safety concerns, lack of infrastructure (I know Mexico isn't so great either but it's much better than Guatemala), and general political instability.
I lived 3.5 years in Latvia (that's where my wife and my grandparents are from) and I love it there, especially in summer (or only in summer?). The people can be a bit reserved at times but once you get to know them, they're very hospitable. I miss the summer solstice traditions and the appreciation of nature. You get that in other countries too, but I feel like it's more universal in Latvia and northern countries. Maybe it's the cold winter that makes everyone enjoy the outdoors so much more. During summer solstice, almost the whole country goes to the countryside.
I lived in NYC for a year and it's a great place for a lot of reasons (the people are very friendly, there's always something to do, etc.) but the cost of living is a real downer unless you're very successful in your career. I missed the vicinity to nature as well. We lived 2 blocks from Central Park but any proper hiking or rock climbing was at least an hour away by car and it doesn't really make sense to own a car in NYC unless you work in sales or something similar.