I use the only real keyboard. The one with the click. The IBM model M. Actually, one of those I have is new, from unicomp. The keyboard was in my backpack the first day I started my new job. Of course.
They all have a ps/2 connection, so you need a usb adapter to use them on modern hardware. I got a question about which adapter I use as not all adapters work well. Apparently the keyboard needs quite some power and most adapters don't like that.
The one I've used for many years (two at home and one at work) is the digitus USB 1.1 - PS/2 adaptor. So if someone needs such an adapter: this is one I know to work well.
My name is Reinout van Rees and I program in Python, I live in the Netherlands, I cycle recumbent bikes and I have a model railway.
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Thanks for your tip regarding the adapter, by the way. It works brilliantly.