I like XFCE because of the ease of customization (keybindings and such). Most other lightweight managers require you to write/edit config files (I’ve used fluxbox and enlightenment in the past) and while it’s easy enough to do, I simply tired of it and wanted something easy. Plus I just like how the default XFCE looks and works (I change it from Xubuntu gnome-ish look to traditional XFCE). I’ve considered lately moving back to enlightenment though.

Fair point. I use Debian extensively at work and there are times when I want an actual Debian install around, like when I’m testing kernel upgrades or checking out the versions of packages in Debian.