To save a few bits of work from forum creep, here's some of my speculation on draenei fashion.
. . . . . I've often envisioned the casual attire of the draenei to be a version of the salwar kameez ( http://en.wikipedia.org/wiki/Salwar_kameez ) modified with pants that either wrap instead of pull on or which are loose enough overall to accommodate hooves. In general, I figure the ladies are often in dresses (many female NPCs are, but this could just as easily be a Western gender norm thing) and that most pants are either wrap pants or lace up the sides somehow.
. . . . . Gypsies were often covered in gold and jewels because that was all they had. As nomads, they had to carry all their possessions, and so they carried their wealth on their wrists and ears. Argus may have been paved in precious stone, but everywhere else, it's relatively useful and portable currency.
. . . . . Evidence for why I think Draenei society could reasonably be theorycrafted as highly ornamented and elaborate - drawn from archaeology.
Anklet with Golden Bells Purple metal (khorium?), yellow beads made of blown glass which is usually more ornamental than drop glass, and gold bells.
Carved Harp of Exotic Wood Exotic woods as opposed to common ones indicate a tendency towards ornamentation again, and now we know music included harps and bells.
Dignified Portrait Oil portraiture shows some skilled - if cheeky - painters.
Fine Crystal Candelabra Dripping with crystals, chains, and ornate scrollwork, this is clearly an item more decorative than functional even though it does have function.
Baroque Sword Scabbard "Almost distasteful in its ornamentation" the text says. Again, draenei like their flash. And they had weapons for magical or ceremonial use.
. . . . . Even if it's "almost distasteful" from a draenei view, it's still heavily ornamented and draenei. Somebody, if just Aunt Nehaanu, liked it. So an argument for a trend in ornamented vs spare could be made. Maybe we've got minimalist modern draenei and fussy baroque draenei.
. . . . . (Hadeon had a friend who wore so much flash that when she told her friends over drinks one night that she wanted to be buried with her jewels, he joked she'd have to hire more coffin bearers.)
Re: Cultural Appropriation in Fashion Choices
. . . . . As a sociologist with some training in facets of cultural appropriation, I don't think what we're doing is so egregious, really. Admittedly, most of my training is in criminology, though. I don't think all parties in this discussion are necessarily from the same cultures themselves, so accusations of cultural appropriation come off as a little excessive.
. . . . . Also, I have no problems with envisioning my characters in the same type of clothing I wear.
. . . . . I would be more comfortable with the idea of cottons if there were any mention of them in game. Instead, it seems that linen, wool, and silk are the natural organics on Azeroth, and whatever passes for fibrous material on Draenor (those reeds in Nagrand?) has to be woven with nether magic of some kind.