I personally like stories on another planet. I feel it provides the opportunity to tell more unique and creative storytelling than I think Earth episodes do. Because with Earth, you are dealing with what we know rather than what we don’t know. A sense of relatable reality. With other planets, you can transfer those same themes in a variety of creative ways. Of course, there are plenty of exceptions to my thinking. Although I do love the concept of historicals since that is technically what the show was founded upon.