[philsnow]

Rootless is a good UX especially if you use a tiling window manager locally, because of the cognitive dissonance when one of your tiled windows is a remote fvwm desktop or similar.

Likewise, I think the overwhelming majority of tiling window managers are very keyboard-oriented, so if you use the same or a similar one on a remote rooted vnc session, there will be conflicts between local and remote keybindings unless you're really careful about it. Better to just let the local WM manage everything.