I find it's better (as a filler and commenter) to have an OP who isn't shy about letting me know if I'm pushing their boundaries but who isn't rude about it. If the fill is stuff you prompted mixed with stuff you hadn't thought to rule out there will be *something* you like in there, so why not try phrasing it like "I really like ___, but ___ isn't my thing. Sorry, but I need to check out of this. I know others will really like this, though, so please keep it up!" And then make a more specific prompt with an 'inspired by' note.