I am, and always will be, a fan of old Nintendo (up through the SNES). They lost me with the N64, and although I liked the Gamecube, I generally haven't been a fan of them since. Although I find the Wii U more appealing than the Wii (It has a real controller!), I'm yet to see any software for it that really interests me.
That being said, I am considering getting a 3DS, if only for more Etrian Odyssey. I hear Code of Princess is quite good as well, and I'd be lying if I said I wasn't intrigued by Super Mario 3D Land.