I am currently fluctuating between Samsung & Google Keyboard. I prefer the aesthetics of Google bit the functionality of Samsung's keyboard. Predictive text and auto correction is fantastic on Samsung's keyboard compared to many of the others.
Must add.
Really enjoying lollipop on the Note 4. Everything is starting to feel gelled together and finally the aesthetic coherence long since forgotten in touchwiz is starting to be fixed properly. There are still traces of half design as we're demoed on the S6 launch event. I hope these will find their way into the Note 4's lollipop stock apps sooner rather than later and it truly will offer a coherently designed experience.
Still wish the icons would get a face lift, the phone icon on particular looks archaic now, even in its flatter incarnation.
Battery life has surprisingly settled down very quickly since my update to lollipop and the device is giving me same battery as kit kat.
What version of the Note 4 do you have? T-Mobile? Just curious how you got Lollipop on it..i know it's out for some versions though..