fem!john never being taken seriously, because she’s just a petite blonde girl, with a bit of pudge around her hips and big, kind blue eyes.
criminals always smiling smugly when they see the lanky detective and her shorter-than-average companion, until joan goes into her “captain joan watson” mode and kicks asses and fem!sherlock punctually flushes and stutters and feels incredibly aroused every single time john pulls out a gun or knocks a 6ft tall man out.