I've used dwm as my window manager for a couple years now, after switching from i3, and have never looked back (i3 was fine, but it had a bug that was affecting me too often--I don't even remember what now). For me, the killer feature (aside from tiling vs overlapping) is that on my three monitors, I can switch virtual desktops independently on each monitor. After being able to do this, I don't understand why every w…
If you decide that you want to see two workspaces from your center monitor, can you easily pull up one of them on the right monitor? The only thing I've ever used that lets you do this is xmonad (described in another comment below).