I've currently got a Galaxy Note 2, contract is up next month.
I've been thinking about the note 4, but when I actually think aobut it, i'm happy with the note 2, Yes battery life could be better, but as it's replaceable that one is easy enough to sort.
Camera could be better, but mine is certainly not bad.
Currently running the latest KitKat, I doubt it'll get official Lollipop treatment, but that's the perfect excuse to try a ROM.
Maybe i'll wait for the note 5.
The z3 looks very tempting, but I don't want to go to a smaller screen.