The complete mystery re: which elements of an application and interview are must-have or must-ace and which are ignored entirely, downplayed, or even taken as "

The complete mystery re: which elements of an application and interview are must-have or must-ace and which are ignored entirely, downplayed, or even taken as "red flags" ("what might that be?" wearing a suit to an interview, or just dressing above business-casual—required some places, practically a guaranteed "no" others) is one of the most frustrating things about interviews. Which is saying something, really, because most things about interviews are pretty frustrating.