What keyboards are best for programming (writing lots of code and comfortable), and why?

Thanks!

So for keyboards, there's a few questions:
* Do you want or need ergonomic shaping, and how extreme?
* Do you prefer normal or low profile (laptop style) keys?
* Do you want the feel to be smooth or clicky?

Quote: Original post by Promit
So for keyboards, there's a few questions:

* Do you want or need ergonomic shaping, and how extreme?

The more normal, the better for me. There should be arrow keys, and ins, home, pgup, del, end, pgdown keys above it, in exactly two rows of exactly 3 keys. There should be a numpad to the right.

Also, no F-lock, I hate F-lock, the function keys must work as function keys (F1-F12), I don't understand why some keyboards, even from well known companies, have this F-lock thing and why the normal F keys are off by default whenever the computer is rebooted.

About the keyboards where the keys for the left and right hand are spread apart, I've never used such a one, I don't know if I would like it or dislike it. Anyone have experience with this?

* Do you prefer normal or low profile (laptop style) keys?

I have a Logitech UltraX (mentioned higher up) in fact, and I must say I kind of like it, especially its looks. However, sometimes a key starts responding less good. With much difficulty and care, it's possible to remove a keycap (not as easy as on a normal keyboard) and fix it, but some other key will then do it again later. Very strange to see that you typed some text and sometimes a letter is missing...

* Do you want the feel to be smooth or clicky?

I've worked with regular keyboards (dome switch design I guess), and the flat Logitech UltraX, and I think both have their advantages and disadvantages.

Some people seem to like very clicky keyboards like the Model M or the "Das Keyboard", with buckling spring design, but I've never worked on such a one. Has anyone worked with those, and is it really good?

What's best against RSI? smooth or clicky, normal or low profile?

Another Microsoft Natural Ergonomic Keyboard 4000 user here. It's literally the best purchase I ever made. Saved my wrists and with it, my entire career.

I too, use the "Microsoft Natural Ergonomic Keyboard 4000", Probably the best keyboard I've ever bought. Wrists don't hurt after spending hours upon hours of coding, and SUPER easy to clean!