I don't use arch, but this applies to my android habits.

Nova has way too many settings now, though.

I use gestures and look&feel and that's about it. Custom icons here and there. Maybe my app drawer has custom folders, colors, tabs. And maybe my folders use custom gestures, transparency, and colors, and icons.

But that's it.

On Linux I use the fuck out of custom aliases for basic commands like ls or grep or less - mainly for appearance.

This is the most useful alias to me personally: ls='ls -aph --color=always --group-directories-first'