We recently installed an engineered wood floor in Fairview, TX and my client and I decided to install iton the diagonal rather than as a straight lay. This was a moderate size home, about 1600 square ft. The diagonal wood floor added to the overall appeal of the floor, made the rooms look larger and just looked great. My client was very happy with this decision. In small spaces, the diagonal would not have worked as well; but for this application it was just right. If you should decide to lay your wood floor on a diagonal remember that you will need about a 7% overage to compensate for the angles and that the installer will most likely ask for an up charge since it will take longer to install.