which do you prefer? HHKB or Realforce?
For compact size: HHKB
Feel of the keys: Realforce. The HHKB keys are a bit stiffer. I mistype a lot on them.
Layout: The HHKB takes some getting used to. For daily programming where I'm using Ctrl-Home, Ctrl-Shift-End, Shift-Down Arrow, etc. constantly to copy and move blocks of text arround, the Realforce is easier. It's the standard layout. That being said, I'm using the HHKB because it's "cooler". ;-)
HHKB = More fun
Realforce = Easier
To answer the question; I'd have to say HHKB since that's what I'm using on my primary computer (and secondary and at home). I have the Realforce on an auxiliary computer in my office and the one I'm actually using right now.
I'm finding that after typing on the HHKB all day, when I try to use someone else's computer I fumble with their keyboard, punching caps lock instead of Ctrl, missing the back space and "\" keys and such. :-/