This is part question and part starting a discussion type thing, but for people who haven't been following Paizo's new releases for August, they're releasing a fair number of sci-fi tie-in products to Pathfinder (Iron Gods AP, People of the Stars, Technology Guide, Starship Map Squares, Numeria) though they've touched on that subject in the past with their Distant Worlds book. Now I know that Spelljammer used to be a thing a while back and, from what little I've heard, people really liked it or at least it had some vocal fans out there.
Thing is, I've been seeing signs of discontent on the Paizo forums (albeit not much mind you) about sci-fi peanut butter getting mixed into their fantasy chocolate but not really any explanations about...well...why they are unhappy. Personally, I've always been a huge fan of combining sci-fi and fantasy with one another, even if I haven't always had the tools to combine the two together at the time and I was an avid reader of the Weatherlight Saga and the idea of a ship traveling between planes (worlds) fascinated me. If nothing else it seems like a wonderful change of pace from typical fantasy settings, but now I'm a little curious about where other people stand on the subject!
Do you enjoy mixing fantasy and sci-fi or no?
If you don't, could you try and explain why?
If you do, how do you try and mix them? In other words do you just dive into the deep end of mixing the two, do you just stick the proverbial toe in by having just specific parts of your world involved with sci-fi, or is it more just light seasoning that you use to spice up an otherwise 'mundane' adventure?