I hate it when I’m looking at the desktop, I swing my mouse to the upper-right corner to “X” out of an app, and the lousy Charms bar rolls out of the right side.
There isn’t one single Charm on the old-fashioned desktop that’s worth spitting at. (There aren’t many on the Metro side worth using, either.) I never want to bring up the Charms bar on the desktop.
That’s why I uncheck the first box on the Navigation Properties dialog -- When I point to the upper-right corner, show the charms.
In those (exceedingly rare) instances where I want to bring up the Charms bar, I just push Windows Key + C.