It depends. I've used a lot in the ~20 years or so I've been programming; and I've come over the last decade or so to rely on the Kinesis Advantage. The big rea

It depends. I've used a lot in the ~20 years or so I've been programming; and I've come over the last decade or so to rely on the Kinesis Advantage. The big reason I chose it when I did is because it doesn't force your wrists into a positive angle, which always causes me pain. I used to use a Model M or one of its derivatives; I also spent a lot of time on the old Sun keyboards. I never found the key action to be as important to my continued health as the physical design; I also don't use a custom layout. I'm happy with my choices, although occasionally I try something new.