I would love to see a CAS-oriented stuff pack with hairstyles, clothing, accessories and facial features that would help to create more diverse, weird, and humorous sims. A lot of these ideas are for ...
animal ear headbands that aren't part of a hairstyle
porkpie hats
whoopee caps (aka. The Jughead Hat)
Impractically wide-brimmed hats a la Vampire Hunter D or Riley from Pokemon
Outfits:
Harlequin tops
Genie Pants
Vests with coat tails on them
poofy knee-length skirts (I mean, anime-level poofy)
Dresses with impractically huge bows on the back
Capes...so many capes...
Fantasy armor, like with crazy pauldrons that are either impractically sized/shaped or only cover the one shoulder and nothing else, and those unrealistic ladies breastplates and armored codpieces!
Platform shoes...including maybe a swatch with goldfish in the platforms...