Answer: Because personality isn't just one feeling or feature. Its sometimes being sad or happy or mad or confused... etc
I honestly don't think establishing a Utopian community is possible.This is mainly because humans are too flawed and wouldn't be able to live in such a society. Utopia would means that everybody thinks the same and is satisfied with the life they're leading, which is not possible, in my opinion. There will always be someone greedy for power, who will ultimately lead to the downfall of Utopia. It would require people to be perfect, which is never going to become possible.
