Windowmaker has had it's first update since 2000, so I had to try it out.
Windowmaker was written in 1997. For me it's a blast from the past as I used to run it in a commercial setting, dual booting with windows 3.11 and running Applixware 4.41 with custom software I wrote for labeling luxury goods.
I chose Windowmaker as it was easy for my collegues to select an app with a nice big button.
After using FVWM, it was easy to set up in comparaison and a unique paradigm straight from Steve Job's Nextstep. I loved it.
Nowdays I use mainly the Xfce4 environment, but it's nice to have something else to play with. I've used Tiling window managers such as i3 but they just don't work for me.