The aruch hashulchan mentions a minhag to make put saffron in foods on shavuos, because it has a good smell, like torah which is compared to a rei’ach tov. He also brings some lesser-heard but interesting explanations of why we eat dairy on shavuos. For example, we find a remez to this in the rashei teivos of the last three words of the pasuk “????? ???????? ???????? ???? ???? ??’ ??????????” (????? ??,??). Also, another interesting reason:
??? ???? ??? ?? ??? ???? ?????? ?????, ??????? ?????? ????? ????? ?????. ??? ?????? ??? ??????? ???, ????????: ?? ???? ????? ???. ??? ??? ??? ????? ????? ??????.