Friends don’t let friends use crappy keyboards!
HardwareBeautiful photo of a beautiful piece of classic hardware, John Gruber's Apple Extended Keyboard. I've been using an IBM Model M clone Unicomp SpaceSaver with my desktops and a ThinkPad as my primary portable computer since 2009; regular keyboards make me feel like I'm typing on a thawed fish.
If you type a lot, you owe it to yourself to use wonderful keyboards. They'll do more for your productivity than any other upgrade, and I'd hazard a guess most people don't give theirs a second thought.