Bloatware and Locked Bootloaders
I recently purchaced a Galaxy Note IV, and found that it came bundled with tons of useless AT&T apps and contained a locked bootloader. I loved that my old phone had a custom bootloader and was rooted as it allowed me to do so much more with my phone. I hate that this phone is so locked down and AT&T dosen't seem to care that nobody uses their bloatware, they just keep adding it.
[Edited to comply with Guidelines]