I would love to just to see different hair styles for each class. I'm wondering what medic would be since the Das Maddendoktor looks a bit similar BUT at the same time you guys have so much freedom to customize this cosmetic since every class wearing it looks different :D

so ideas would be:

Pyro = hes a bit harder to do but maybe a mohawk with the goggles. or just the goggles and they are sideways/crooked on his head like the summer shades because it's pyro we are talking about.

Soldier= maybe a designed army like buzz cut with the goggles over his face or forehead.

Spy= maybe the maskless spy hairstyle type with goggles on his forehead.

Heavy= maybe a boss hairstyle with a added bullet behind his ear with the goggles on his forehead basically similar to the Bullet Buzz, Hound Dog, or a Duke Nukem style but in your own distinct style.

Medic = its a bit hard with the Das Maddendoktor maybe its like a doctor who hairstyle with the goggles on his face (because of the glasses)

in the end it is your choice but I'm just throwing out some possibilities since this cosmetic has so much opportunity to be all class. ^-^