I love vanilla gnome. I totally understand how some users prefer the flexibility of KDE, but a clean, minimal interface with easy access to workspaces is just the thing for me.
Most of those require some configuration out of the box and target power-users who are comfortable with manually editing text-based config files (or editing header files and then recompiling from source if you're one of those people). One of Gnomes big selling points is accessibility, which none of the tiling WMs offer in any significant way.
If it still allowed me to do everything I wanted to in an easy enough way, I wouldn't be opposed. I would say in short, I don't know enough about it to know whether I'd like it.