The first design drawing I sent to Craig had the SNES layout. He was concerned about legal problems based on that button layout and I couldn't prove without a doubt that it's not a trademarked, licensed, or patented pattern. It does seem a bit odd that you could and it's possible companies like Gizmondo and Sony went with different designs, not for protection, but just to be different.
I too dislike the GP2X button layout and I would like something different but I do like the ABXY buttons, of course that will only suit emulators from the particular company they match. I also like the idea of something unique, but I dislike some funky difficult symbols because when I'm playing a game and have to hit the right buttons, I don't want to have to remember "squiggle, squiggle, slash, yellow moon, green clover".
The NSEW setup is interesting but I wonder if it is too specific? (ie. directions instead of actions)
P&|A is funny, but more of an inside joke than a good button choice!