Comfortability: Xbox One (it feels just perfect for my hands)
Battery life: Wii U Pro Controller (80 hours)
Layout: Xbox One (since I used Xbox controllers before I still get the A, B, X and Y wrong on the WUPC)
Weight: Wii U Pro Controller (being super light-weight allows for long gaming sessions without the hands feeling tired of holding it)
So for me, my ideal controller is Xbox One and I've tried PS4's too but it was a tad small for my hands and not as meaty as the XO controller. It's a shame that the WUPC doesn't have analogue triggers or it'd be almost as good as Xbox One and PS4's controllers.
Due to the controller alone I'm more inclined to the Xbox One than PS4 but there's the device which allows to use any of them whether it's the Wii U, PS4, Xbox One or even last-gen consoles (I think).