There's a need for balance between simple and not cluttered.
Agreed.
My personal point of view (sorry for the threadjack, but maybe the OP will have more questions - or better still, answers - when I'm done) is that I'm going to have Maximus Arcade loaded, and for now, just the MAME emulator loaded up. While I wouldn't
need the "Home" key mapped, I hope to have a button for that. (I believe many people use the "Lists" decal for that one, but I might be wrong.) If I add any other Emulators, I'm praying that they should work with the buttons I'm including - but if there's one I'm definitely missing, I'd appreciate the feedback. That's button one on my Admin Panel. From there, I was going to have "Esc" mapped as button two, "Enter" mapped as button three, and then a large blank space, and "Pause" mapped as button four and then five and six will be "Volume Up" and "Volume Down", respectively.
I believe that this is the 'balance' that would make it easy for anyone to use the games installed, and also without looking too cluttered. Six buttons across a dedicated panel of two feet should still be pretty easy on the eyes.