Brass can definitely be done tastefully, when I think buttery goodness though bronze comes to mind. It's got that warm color to it even when polished that looks just right to me.
I'd love to have an old Randall. The closest thing I have to a classic like that is a Ruana from the 50's, it's a beautiful knife.
Aluminum is great for it's weight and I've done some pommels with it. Not fun to work with in my experience, if you don't clean your files after every few swipes they clog up fast and quit cutting.
Hey welcome to the subforum, glad you found our little corner. It's a pretty good crew in here.
I use the Cowbell etch on the ricasso of the Cowbell knives, they also get an etched Redmeadow on the spine. I don't know about adding a cow but we could probably use some merch with one. Maybe Clarabelle's for hire