I only play Mario Kart and Smash Brothers nowadays, I don't really have any other games for this console and I only play those when I'm bored.
Just like with all the other Nintendo consoles, I am hooked yet again on Super Smash Brothers. I just love that game, ever since it first came out. I have pretty much tracked it throughout the whole time it has existed, and I am pretty sure that I have played it on every platform possible, and I just might say that it is the best on the Wii U. It always ends up being Kirby as my favorite too.
Hah, that's cool! I recently found out Splatoon, which is a really fun game to play on the Wii U. I recommend you give it a go if you don't have anything to play on the console.