Variations in the wood like color, width, thickness, or cut, assure each roof will have it's own look. Good insulation properties. With proper maintenance and repair the lifespan can be greatly increased. No real choice of color or different pattern. The exception being with the installation, such as having a stagger, or pattern of thicknesses.
Fire protection is less than some other materials.
Fire retardant are used and are effective, but wood will still have a greater chance for burning than cement or clay. This is more of a disadvantage in the country because of the chance of wild fires. Mold, rot, and insects are more of a problem in the older shake roofs. Quality of roof dependent a little more on experience and dedication of roofer. Grooming, right size selection and correct nailing, can be very important.