I'm not really particular about tropes themselves, but I would love to see some more quirky/nontraditional au premises! one of my favorites is like double cherry pie (https://archiveofourown.org/works/65212552) and you all know I'm loving upyr software (https://archiveofourown.org/works/77733136/chapters/203618996), plus basically any biniselixir au is always very creative like this; pulse diagnosis (https://archiveofourown.org/works/65597623/chapters/168888679) is another example but that one appears to be indefinitely unfinished, and I haven't started it yet but I have a feeling that the baramsae groom (https://archiveofourown.org/works/80722076/chapters/212024431) will fit the bill! I've mentioned before that I don't feel really strong in worldbuilding as a writer myself, and I just love fics that introduce concepts that I wouldn't have thought of or play with less common settings/roles for the characters. but honestly, I am always happy to see anything (⌒▽⌒)♡