I also posted this in Consumer Electronics, didn't see Console Gaming before. But . . .
So, if you do not own the Wii U, you may not be able to help much, but keep reading if you'd like.
Something that is really aggravating me is the gyroscope function on my Wii U gamepad. In the game "Nintendoland" there is a gimmick with the gyroscope/axis of the gamepad that makes the camera in the plaza of the game rotate/move according to the way the gamepad is being held. Well, when I place the gamepad down on the cradle on my desk, the camera still thinks it is slightly tilted to the left. I initially thought this was an issue with the gyroscope, but then started to give myself some hope by thinking that it was my desk/basement being bowed/unlevel, and placed it on my floor as well, getting the same slightly tilted to the left effect. I then thought to turn the gamepad around so that hopefully it would be tilted to the right instead, and while this did tilt it to the right some more, it did not flip flop the offbalance of the camera and only made it tilt a little more right, while still thinking it was tilted to the left some. I tried this on my floor as well, getting now different results. The tilt changed as I moved it throughout my room, placing it on different flat surfaces, it did become practically perfect (still like a hair off, but not noticable) at one point, but never tilted to the right at all when set flat, only left. I took it upstairs and sat it on my upstairs floor (which is still slightly underground) and I can not recall how it sat on the ground, but it did get about the same result on the table, and was perfect when placed on a corner table. I used the orientation sensor on my android phone and it sees all the spots that I tested it at being perfectly level, the ones that did not level the camera and the ones that did.
The gamepad works fine in any game needing it, it spins as it is supposed to, and can recognize all of my movements easily. It is just this slight unbalance that upsets me.