I bought one back in the fall when they dropped the price by $50. So far I've had 3 games. Super Mario 3D World, New Super Mario Bros. U, and ZombiU. The Mario games are good as usual but I'm just kind of tired of the same Mario games every year. ZombiU is actually kind of cool. I haven't played that much of it and it got terrible reviews, but it at least uses the gamepad in a unique way.
Mario Kart 8 and the new Smash Bros. game really don't excite me much. But one thing that is cool is they've started adding Game Boy Advance games to the Wii U Virtual Console.