My favorite size keyboards would be 75% or 60%. 60% because portability of course, and I find the FN layer actually helpful for arrowing over while programming. 75% because I play StarCraft II and need F-keys in the standard spot for camera hotkeys; but I can't find one so tenkeyless will do as well. Full-size keyboards are fine, but my mouse is too close to it and I can forgo the numpad. Thanks for running this giveaway!