While I don't use GNOME and don't plan on switching to it any time soon (KDE Plasma for the win!), I've played around with it now and again and I think it's actually quite good. My only real annoyance is the GNOME settings manager doesn't include some fairly fundamental things, like the ability to change themes.
I don't tend to change themes much, but come on.... Just give us a frelling toggle switch to enable Dark Mode.
With Windows 10 and MacOS Mojave now embracing dark themes, I feel like the GNOME devs picked a bad time to decide that themes shouldn't be a thing.