I moved to KDE from Gnome for a variety of reasons, but I genuinely miss Gnome and Native GTK apps. They weren't as customizable, but the features you did get work so well.

One of my main issues with KDE is that the default keybindings for desktop operations feel like they were designed by people who don't navigate their desktop with a keyboard.

Then there are little things like in Gnome the screenshot implicitly copies to the clipboard, while in KDE you have to click the copy button. There are just little points of friction I experience in KDE that make me yearn for Gnome's workflow. I think my ideal world I would have a KDE desktop that used all the Gnome shortcuts, and worked more like Gnome.