My first instinct was to answer: Not Battlestar Galactica's, surely,
I'm afraid I'll probably be going to give the clichéed answer here. After all, I have to throw out all the superhero universes on account of all the buildings falling down and bank robberies happening about once a minute. Any universe under constant threat of war or invasion is likewise dismissed (Doctor Who, Star Wars, Middle Earth, etc.). Dystopias are right out, as are worlds where the supernatural hunts human flesh (Buffyverse, X-Files, etc.), and most Utopias have a vicious underbelly or nasty trade-off. Fictional universes are basically fueled by conflict and strife, often on a "universal" scale. So I'm looking for a clean Utopia, where civilians like me do well and the conflict isn't so close to home. There can only be one.
Hope that answers your question, Nath! And if anyone out there has a different answer, please be sure to share it with us!