Have you ever imagined such use of OSB (compressed and glued wood stripes forming boards)? This one's quite extreme as the whole interior, even the door is made of it, but I like the idea and the raw and natural look. Kitchen cabinets made of OSB look really good as well (look HERE)! Of course, one on the main reasons of using it is the low cost of the material but for me it looks great anyway.
More photos of interesting interiors with OSB you'll find on my Pinterest profile.
The photo above is from a project of London's Carl Turner Architects.