I am playing a few games (not at the same time though. lol)
I am currently playing New Super Mario Bros. 2, Nintendo Land, New Super Mario Bros. U and finally I have opened Paper Mario Sticker Star.
I have also got back into Animal Crossing: Let's Go to the City now that I have a console that isn't making a really annoying buzzing/grinding noise whenever I inserted a disc that made me feel like I really wanted to drop my Nintendo Wii out of the window...
Playing AC:GC, Paper Mario: Sticker Star, TF2 and the Wii U. Yep, I got the 32GB Premium Pack in the mail a couple of days ago and I'm also playing Nintendo Land and Sonic & All Stars Racing Transformed.
I'm playing New Super Mario Bros. U now. I beat the game, but now I'm going back for all the star coins. I'm actually enjoying hunting for the star coins more than I enjoyed my initial play-through.