Gnome with Wayland: I am just too used to the touchpad gestures and sleek looking apps to go back. Even windows looks and behaves janky in comparison
Firefox: plain better than the alternatives, the scrolling is so much better under Wayland too
The auto dark mode GNOME extention: it between dark and light mode depending on the time of day
Rounded window corners GNOME extension: forces all 4 corners of applications to have rounded corners
Separate /home partition, very useful for distro hopping or in case just going the nuclear option and reinstalling everything is the easiest way to deal with a breakage