They can only be answered subjectively, because different people value different things. That's why such discussions usually end up with clusters of people with somewhat similar preferences arguing inconclusively with other clusters who do not share their preferences.

You're sitting here like "oh maybe it's better for all of us if some of us are miserable, it's subjective you know." Fucking ghoulish.

> In fact some of them conclusively have been.

Don't leave us in suspense! Elaborate.

No, they absolutely cannot be answered objectively. Some people will be very happy living in a rural setting with nobody else around, while it would drive other people absolutely bonkers. The same is true for "city living". Different people have different personal preferences about what constitutes happiness, and these preferences vary widely.