I love the ceiling idea. A modern take on vintage ceiling tiles. We don't have any drop ceilings, but a similar look could be attained with a stencil if I had the patience to do it. Perhaps in a bathroom where there is less ceiling.
Laundry and Mud Room Makeover by Unskinny Boppy, via Flickr - neat idea for the drop ceiling panels - we could do this or something similar in the stone house - not sure which room though - good inspiration - will think some more about this