My favorite music app? Google Play Music. I know, kinda obvious. It's because it makes very clear what's in the cloud, what's on the device, and how to move from the former to the latter. That, and Google lets me upload 20,000 songs (that's 11,000 more than I've ripped of my 1000+ CD collection so far), so I can actually store a LOT of my own music on Google and play on my Nexus devices. $WIN
I don't have any decent wired, headset earbuds so this would complement my N4 delightfully. Thanks as always, AC staff!