Keyboard: The venerable IBM Model M Keyboard.
I have a private stash of these keyboards, which I started collecting back in the early 90's.
'Sup fellow IBM Model M hoarder! I have a stash of these in my office at work that I've accumulated as we've transitioned over to USB-only computers. I keep the ones that are salvagable- most that come through here are so caked in food and garbage from years of use that I wouldn't dare touch them. I probably have a good 2 dozen, a supply that will probably outlast me and my great-great-grandkids.
My PC at home has no PS/2 ports so I bought a cheap ($4) PS/2 -> USB adapter from Newegg and am still rockin' the Model M. Once per play session a movement key will get stuck down but hitting it again frees it up. I could probably solve that by spending more on a nicer adapter, but I haven't wiped a raid yet so I'm not too chuffed.
My trusty Logitech 518 has served me well, although I could use a few more buttons for keybindings. As it is, I have all the buttons & scollwheel + shift + ctrl keybound.