I don't know about you, but I'd love to see more hats on subeta. :3 Oftentimes, I'm channeling a certain period and there isn't a hat for the occasion. :c
wikipedia has a nice list of them
Bonnets like (and there are many other types of bonnets, like this one)
Cloche hat
Gatsby / newsboy hats (in better colors than the ones on site since those are old?)
Deerstalker so we can pretend to be Sherlock okay
more period hats for the boys (look at that clerical and wellington! fancy c: )
and more period hats / hats from other cultures for the girls: hennin, kokoshnik, ochipok
Got any specific suggestions or pictures to share? Post them as well! n__n
I support this and I appreciate all the thought you put into your suggestion. More clothing that's evocative of certain periods in history in general would be great.

I have so much need/want for men's period hats and caps... And different kinds of helmets... And proper crowns and coronets.... (Proper crowns and coronets especially... Like these: Click and scroll down! I would cry with joy. Seriously. /srsface)
I also support women's headgear, but I make male HAs exclusively so... Yeah... Not so much need there. Maybe just a little want. LOL
Why not making these hats for Masquerade or Vesnali? The former ones would be nice with a steampunk touch while the others could be in pastel colours or flower-shaped.
I support any and every hat!! We so need more hats of every style and every color XD Crowns are very needed, too.
I shall try to dig some more ideas when I'm done sorting pings, mails and things x_x stop being lazy