XFCE4. It's intuitive and predictable without sacrificing the ability to customize it exactly the way I want (with Chicago95 ofc). The built-in panel widgets are nothing short of amazing: battery, CPU, RAM, network, and disk monitors with labels toggled off to save space and a clock with only what I need on one line: MM/DD HH:mm:ss

Enough features so that it "just works" (no nitpicking through config files), especially on laptops, without being bloated in any way. Bonus of its lightweight nature is that I can keep my Debian/XFCE setup consistent across all of my machines, both old and new.

Can't wait for the finished xfwm4 port to wayland so I don't have to sacrifice some security running X11 and so I can do fractional scaling on hidpi machines.