I believe it is sort of connected, the colder northern regions (canada, scandnavia) are usually very pretty with (more) undisturbed nature. Because a more moderate climate usually attracts more people, and those places get covered with buildings.
And if you just look at european countries like sumguy suggests it is only the ukraine that has a higher murder rate than the usa. (most others are in the rest of the americas (south and central), and africa)
look for yourself
I like bright skies (but can thoroughly enjoy storms) but I am not one of those that feels like the hotter the better. 17degrees is more than more enough 20 is fine too but over 25 I get seriously ill and even in the shade is unpleasant, in the sun is not even an option. (and then you see people still with long pants and sweaters, and I think what?? I am totally incapacitated)>
Atm it is about 12 degrees and very very sunny, lovely ! it is not shorts and tshirt weather anymore, but it is really nice. And the sun is still very hot your face still burns. (I hate sunless and drizzling weather though, if it is dark, let it pour and storm and thunder!)
Personally I love the opportunities a city has, there is allways something you can do, a lot of courses you can take, and it usually matters less how you look. But to have to life there everyday is probably not for me. A car unfriendly center sounds great, tht actually sounds like a big plus. I need my nature and my quiet (though not in the best street for quiet, some very loud people unfortunately, but trafficwise it is quiet and not polluted either). Places like canada and scandinavia sound great to me (but their big cities still not too much).
For instance, if amsterdam is on here, why not the rest of the major cities in the country? (and major only because there is more transportation and entertainment there. Other standards of living is are generally the same throughout the country. The flip side of big cities is housing though, one of the criteria, it is very scarce in big cities and ludicrous prices, so that would take the scores down again_