Wood reclaimed from barns, swamps, and centuries-old homes continues to set the trend for the wood-flooring market, even as bamboo and other "green" alternatives make their way into the mainstream. Engineered wood, consisting of a veneer of quality wood atop a plywood base, is also expanding its repertoire to include exotic species and character woods. Make your pick based on cost, the stability of the subfloor, and maintenance and you'll be pleased with the results.