I would choose the Nexus 6P over the 5X for a few reasons. The main one being screen size. I have been into the larger screens since the HTC EVO. I find it much easier to consume media and video that way. For me(opinion) anything under 5.5 is small. So, wether I win or not Love the site and Thank You for the opportunity.
I would love to own a Nexus 6P because it's pure Android comes stock with the lastet operating system as well ability access to Project Fi. I never owned a pure android phone only a Nexus tablet. It would be a pleasure & honor not only to own a Nexus 6P but to win one would be the icing on the cake.
I'd love a Nexus 6P so I can make all my iPhone friends feel bad about their purchase! Also, because I've never had a Nexus and want to see what all the buzz is about over stock Android!