Note 3 was my first and I loved that phone, from there I got the Xperia Z3, then Galaxy S6, then LG V10 then Blackberry Priv (I hated that phone) so I traded it in for the Note 5 and now I have the Note 7. I have the T-Mobile JUMP On Demand! program where I can upgrade 3x a year.
Honestly, unless the S8 is totally game changing, I don't see myself jumping until the Note 8 comes out, unless maybe I jump to a Note 7 of a different color.