I don't have a Wii U, since I've decided to be a PC User and I don't regret it so far.
But... If I had to choose one console this gen, I would go with Wii U, since it has unique games like Super Mario 3D World, Splatoon, Yoshi Wooly World, and the incoming Super Mario Maker that looks great too.
I honestly would not buy a PS4 or a XOne. Their games are very similar to what I play on PC.