I too strayed for awhile and tried the Moto Maxx XT1225 and my main complaint with the Nexus 6 when I did that was....size, case selection, and glass screen protector not fitting correctly. Well I am back and very happy with my decision to come back to the Nexus 6. Even with the stock like feel of the Moto Maxx it still would stutter and that is no bueno. Especially the keyboard, I would start typing and the letters would not come on screen for about 2-3 seconds after I typed them.
I am going with the Ringke Fusion case and looking for a good screen protector. Happy to be back.