For me it is Openbox, for other people I know it is generally i3wm, dwm, or xmonad. Speaking for Openbox (since it is what I use) the benefits are numerous: le

For me it is Openbox, for other people I know it is generally i3wm, dwm, or xmonad. Speaking for Openbox (since it is what I use) the benefits are numerous: less lost space on screen (UI is customizable to the pixel simply by editing an XML file); extensive and customizable keyboard controls (again, just by editing a simple XML file) for managing windows (resizing, positioning, etc.) but also for launching applications and managing multimedia keys for instance; more lightweight in term of resources (not that important, but always nice); and being compliant with ICCCM and EWMH standards which allows extensive external scripting using tools like wmctrl.