Not that I have an empty closet, but i do like this."Closet Office" - Turn your un-used closet/reading nook into an office space. Maximize the little space with lots of shelving and storage *LIKE CORNER DESK/nook & shelving for office corner
This design is crazy, I love all the natural light, and the wall of windows that appears to lead to a greenhouse. The stairs being right above the kitchen is very cool, that's something I have seen very few times.