all of the above. Each faction has its merits. Only problem is they all are fanatic about their beliefs. which is a problem. get passed that and the world be be set.
Just imagine other parts of the world,. this is just the US. I could only imagine what it's like in other areas.
edit to add: enclave and Bos are a bad choice alone. If they joined forces they would create a force to be reckoned with, but that would never happen. Sad truth is neither faction would be good for the people of the wasteland. I think allot people want to be protected, but don't want someone looking over their shoulders or reaching in their pockets every day.
Personally I would rather create a new faction that more powerfully then either faction.
This faction is called The Couriers