I actually am very happy with my wii u, i can play some old games in it, finally played metroid prime trilogy and the console's own games are excellent, some of them even managed to be my favorite entry in the franchise (mario kart, dk, super mario 3d world, smash, etc).
I don't think that the wii u is the "main" console to own though depending on your tastes. I am a big nintendo fan so their offerings please me a lot. But i will still get a ps4 for naughty dog and third party offerings (rockstar games, kojima, rocksteady. etc).
Oh and right now the wii u has a lot of games that i need to buy that already released, and this year promises to have lots of great games coming out for it, and 2016 already has zelda.