I'm all for innovative design.  But, House K by the Japanese architect group TANK is just a little too much.  The over-abundance of concrete gives this design more of a warehouse feel than anything.  Though practicality was sought in this instance, going in a direction of white walls or metal over concrete, or simply covering the exposed ceiling and electrical would have given this house a more "livable" feel.  

To their credit, the architects explicitly state the bare-bones nature of this design was at the request of the clients.  But, I'm still not sold.  

Read more about it here to decide for yourself.