I've updated my setup, and I am now super happy with how the colours are looking on my Polybar. I've changed to the Base16 Google-Dark colours for my whole system and VIM. Will update post and dotfiles once I've themed everything else.
Here's a little showcase of some terminals and a GTK app floating. NOTE: I just realized I need to figure out how to make Ranger use my terminals alpha background. I'll add that to the pile.
TODO: Rofi, LightDM, Compton
After about 3 full months of using nothing but Linux as my main OS after many failed attempts with Debian/Ubuntu/Mint over the years, I can finally happily say I can't go back. I still have Windows installed for a couple games, but never boot into it because I rarely game anymore anyway. I just feel so at home on my system finally, and there's still so much more to polish workflow wise.
I may even look into PCI passthrough at some point to run a few Windows games in a VM on Linux.