I have really come to like copper as a metal for DE razors. Since my first razor was the Merkur 38C, I've always been drawn to heftier razors. There's something about a substantial feel in the hand that I like. I think this is why I struggle with aluminum. I know it's going to be light when I pick it up, but I'm always shocked at how light they are. Another point to copper is the heat retention. It does seem to be able to absorb and retain heat much better than the other metals. And the third point, is the ability for it to patina. This is the one thing I'm not necessarily a fan of. I generally like polished razors to start with as opposed to more matte like finishes. But, even with a matte finish, I still prefer to not have a patina form. Though this is generally unavoidable. My copper alpha razor came with patina already forming when I took it out of the box!
Below I posted a picture comparison of my Karve razor in copper from the day I got it until now to show how the patina has formed. I have owned it for about three months now and it spent most of the time in the box after being use and dried. Though it has been out of the box and exposed for just about a month now.
integritas pietas fortitudinem