If you're into everything environmental and green, an aluminum roof could be the perfect solution. While asphalt and cedar shake roofs have their advantages, they pale in comparison to aluminum roofs when it comes to sustainability.
Aluminum roof material can be easily recycled and turned into other products, which reduces the amount of material going into the landfill. By comparison, asphalt can take a few hundred years to decompose in the landfill. Cedar shake shingles are made of wood, which translates to cutting down trees.
An aluminum roof is lightweight, easy to assemble, and requires little maintenance. As such, it does not need the extra support needed for tile or slate roofing. An aluminum roof is resistant to water and moisture damage and can last a lifetime.
In coastal areas, aluminum is a popular options, as it is resistant to rust and corrosion.
One important part of a roof's longevity is the installation, making the roofing contractor a vital component in the functionality of your roof. Look for a contractor who specializes in metal roofs and has a good reputation in your area.
As you check references, ask to look at aluminum roofs that were installed five or more years ago. This can give you a sense of how well the material stands up to wear and tear.
One final note about aluminum--it also comes in a variety of colors. While you might not actually want green, there are several options beyond the traditional gray color.