Participants in the discussion express a strong preference for living in the Star Trek: The Next Generation universe, citing its advanced technology like the holodeck and replicators, as well as its generally stable environment. Other popular choices include Stargate SG-1 for its relatable setting and the Culture from Iain M. Banks for its idyllic nature. Some participants critique the later developments in Stargate SG-1, particularly the body-switching device, which they found hard to accept. Additionally, there are mentions of other universes like Firefly, Doctor Who, and Avatar, each bringing unique elements that appeal to different individuals. Overall, the conversation highlights a desire for utopian or adventurous settings in science fiction.