Buttons on the side still....
One thing I HATE about my One M9 is the power and volume buttons all on one side.
I dont know about the rest of you mere mortals, but when I pick up my phone, I usually grip the phone by the sides. This results in accidental and infuriating button presses where I just want to hold the damn thing. Some people have even managed to turn it off while on a call when I've passed the phone to them! Or reduce the volume to mute. It's just a bad design from an ergonomic perspective.
I would like to see some better ideas in that area. I dont know why they moved the power button to the side, as it was in a good place on top - not easily pressed/mashed by accident and an easy enough place for a finger to go to when unlocking the thing.
Volume rockers have always frustrated me being on the side - only LG had any good ideas there with the rocker at the back of the phone! Wish more manufacturers could do that. Shame the phone wasnt that great.