I always thought the DK cosmetic of looking more dead was a really cool idea and I was thinking how cool if this kind of thing was introduced to other classes. Like a warrior could be covered in scars, a shaman could have a little elemental effect, druids could have a little feral effect, etc.
What are your ideas for class cosmetics?
Hunter players drooling on themselves effect
I think it would be cool if monks had racial colors and themes to their abilities vs jade green lol.
The 5% size boost for Colossus should just be made baseline for all Warriors.
I’d like the Oracle eye effect on Priests…and would love a Void variant for Shadow.
I’m all for more glyph and barbershop options! I’d also include profession related barbershop options as well.
Could be cool if done right. Pallies would look awesome if they had glowy eyes like in Uther’s art for instance.
YOU GO TO HELL AND YOU DIE!!!
No, but I would definitely use that one. Crossed eyes too! I want the full Spaceballs, “Who made that man a gunner!?”, effect.
I feel like such concepts work from the Loa designs. 
For Evoker, I would love more options to tie ourselves to a favourite Flight if we wanted. Perhaps the same shade of scale colours that the Flights use (we have the colours of them, but not the same shades), or my personal favourite, those blue tattoos that a lot of the Blue Dragonflight use. 
Could add something interesting for each of the Flights. Arcane tattoos for Blue, sand particles for Bronze, etc.
Definitely want some more class cosmetics, weapon skins especially.
Haven’t been fed in that area since Legion.
Rogues having darknened aesthetics around the eyes/face to act as a type of camouflage.
Lightforged aesthetics to for Paladins of any race.
Glowing eyes for Mages.
Bought spit my coffee reading this 
I think every class should have a couple of “battle worn” options, like the Kul Tirans, or the Earthen. Although, TBF, my worgen human and wolf both rocked the “scarred eye” look and I made both blind in that eye. Shame it was not the same eye LOL
Warlocks getting the bright green eye options that we see in the Eredar draenei customization. Heck, even the LFD warlock NPC from the questline does have that green eye, even though is not available for LFD.
Mittens pinned on their jackets
I’d rather customizations weren’t class specific, personally. I’d love to see scars and tattoos for everyone!