system
Given the following post, respond as if you're commenting on Reddit:
human
What would be the best and worst fictional universes to live in?
gpt
I think worst would be the Warhammer 40k universe. You're either more or less a slave on a factory world or dead. 

For best I'd go with he Culture universe. I've only read one book but the Culture is a real utopia so it makes sense to me.