Great list, although like most tools the full experience comes after spending a great deal of time tinkering with it. Two of my favorites on that list are awm (Awesome) and i3. I started with awm after using the mess that is Unity (Ubuntu) then switched to OSX. Then I started missing tiling window managers, so I started using spectacle, which is great. Recently my SSD failed on my MBA so I switched to Ubuntu and to the even greater mess than before, Unity. Apparently one needs SLI/Crossfire to get acceptable performance in Unity. So, I switched back awm which is still great but shit when it comes to multi-monitor support out of the box. Finally switched to i3. Moral of the story is one should use what works best for him/her as long as it's not Unity.