I've ben drawing on Miiverse more than I've been playing WiiU games. And I've been playing a lot of WiiU games. ZombiU is kinda like Dark Souls/Demon's Souls, which is neat, though the combat's way too shallow and ammo is practically nonexistant. Tekken Tag 2 basically the superior version of that game, with the extra modes and DLC characters from the get go. Mighty Switch Force looks waaaaaaay nicer on the WiiU than on the 3DS, though I do miss the 3D effects. And again, NintendoLand is way more fun than it has any right to be (hard too).
But the most important thing is that the Raving Rabbids message board has been taken over and is now unofficially a Willem Dafoe community:
There are pages and pages of it
