I wouldn't do shiny brass I would do antique brass look at countrycurtains.com for their antique brass rods

I'd do ORB to tie in with the dark trim on bed and headboard.

I guess it depends on whether you want it to be a 'feature'.

I have black in my bedroom because I wanted them noticed, and in the living/dining rooms, I painted them the same color as the walls because I didn't...

a non-polished brass would look great!

Brass.

Brass or an antiqued gold.

If you want a brass finish light fixture, then get it.

The metals don't have to match, but they need to blend and look good.

ORB is a finish, not a solid material. In most cases ORB is not actually bronze, but another metal or alloy. Most decent hardware is brass and then the brass may have a plating/finish, such as ORB. There are a few companies that make actual bronze hardware, but that rarely has an oil rubbed finish, usually it's some other patina. I think polished brass would look pretty ugly in your space.