My hands decided on my daily driver for me. I've been a fast typist my entire life and the decades of too many keystrokes had caught up to me. By the time I found this site, I was switching through several rubber dome boards a year and using speech recognition software to do anything that wasn't work related.
When my hands first started giving me problems, the first thing I did was go out in search of the last keyboard I had that felt comfortable to me. It was an ALPS board that was no longer being made, but I found a bunch of them for sale online. I bought five of them only to discover that while they were better than rubber domes from Logicrap, those too were hurting my hands now. They felt nicer, but it still hurt so I started searching for other kinds of keyboards and ended up here.
I lurked on this site for a few weeks to read about different switches and went for a Filco Brown 104-key because I wanted the lowest actuation force possible without having to pay up for Topres. When I tried out the Filco, it was easily the most comfortable keyboard I've ever had for my hands. It didn't cure my wrist pain, but it allowed me to type a lot longer with less discomfort. The story would have ended there, but you don't hang out on this site without developing a burning itch to try everything you possibly can so I took the keyboard tour and ended up owning everything in my sig and more.
I fell in love with buckling springs again, but my hands weren't so keen on them so I could only use my Model M's for a few hours at a time for kicks. When my wrist flared up again, I decided to spring for a Realforce 103U. That's been my daily driver since. It's got the soft touch that I like about the Browns, but it has just a little bit of the snap you get out of the buckling springs. It was the best of both worlds for me. I've barely used anything else besides my Topre board in the past year. This board is so "it" for me that everything else just feels wrong now. I pulled out one of my Model M's and it lasted 30 minutes because it felt clumsy in comparison to the RealForce and the loud clicks were annoying me.
The only other "keyboard" I use on any regular basis is my iPad. I've been pleasantly surprised that I can touch type on a touchscreen with very little discomfort even when my wrist is sore.