[M.R.Victor]

Such an odd question, re-locating is never easy, and making the choice to leave friends and family to move to a potentially underdeveloped nation is stranger still... isn't San Diego a city that already fits your criteria of good weather with hills and mountains nearby?

That said, I think it's important to know the reason why you're fed up with the US in the first place, that way your move will be better informed. If social justice is important to you, then you'd look for a country with high HDI. If community is imporant to you, then you'd have to pick a place where you'd eventually fit in. If urbanism and urban life are important to you, well you'd have to choose carefully on that also