I have Ryzen 1700 with 3600c16 8pack RAM and a 1070 G1, 250+500GB SSDs for OS and games.
I would love to change the GPU, partly for a rattly fan but also because I'd like some more performance, despite the fact that most games are fine on it and when I do find time to game it's usually not the latest releases (ARK:SE is too demanding though@1440p!). In hindsight I wish I'd bought a 1080ti before the mining boom, but there's no way I'm paying that much now when it's 2 years old tech.
All my hopes are pinned on Navi to maybe rekindle some competition in the GPU space (yes, I know....!).
I think realistically my next move will be more/faster SSD (such as 500GB NVMe for OS and 1TB SATA SSD for games), purely because games are ridiculously big now and I get fed up of having to reinstall them (ARK is already close to 150GB and Extinction isn't even out yet!).
I'd also like to add a mech drive (2-3......-6TB) to give me more room to record gameplay at high quality (as I'm currently using an old 1TB external!) but it's not a priority as I never find time to edit the videos down and upload them
Would also love a G-sync monitor, but not going to buy into a proprietary standard and my trusty 27" DGM is still going strong