The effect of exposed concrete can run the gamut from cold and institutional to playful and artistic. It may not be for everyone, but concrete does add a unique texture and atmosphere to a space. If not done correctly, it can feel unfinished, as if you forgot the drywall. But in the hands of the right designer - and with the right room built around it - concrete can be an awesomely stylish element. The four homes featured here are different in their approach to the concrete, but that should be all the better for getting you inspired.