Probably #1 reason for me is timely updates/patches straight from Google.
It's been awhile since I have used pure Android and prefer it.
The build and the size is ideal for me and looks sharp in my opinion. Light and pocketable
Awesome, quick Nexus imprint. Love that.
I dont need all the bells and whistles. As long as the camera, display and performance is good, then I am good. And it looks like the 5x fits the bill.