I am 100% stock, I repeat, 100% stock. The bootloader is unlocked. I got an OTA yesterday for 6.0.1 MMB29K but this morning I found my Nexus completely drained so I charged it and powered on. Seems it was drained by a bootloop. I tried flashing 6.0.1 manually again today with fastboot (bootloader.img, boot.img and system.img). I'd prefer to not reset my device until someone can confirm that something isn't wrong with 6.0.1. Thanks!