I think you can have the best of both worlds with alternating doors. A big long structure where every other door is on the same side of the building, such that each person gets a small porch, small "yard" and their own door. This still limits the natural light.
That can be mitigated by having a common space outside, as well as having similar setups next door so that, while you might not see others in your own building, you'll be able to wave at people next door. And if enough people do that, and then go down to meet them in person, you'll start bumping into your own building-mates.
I'm not actually describing theory; I have a friend in Sweden who has made friends this way.
