Virginias and English blends benefit the most from aging. Burleys and aromatics the least. In fact some people say aromatics deteriorate with age. A year makes a big difference, but even six months helps. Aging pipe tobacco is a relatively new concept. Fifty years ago the conventional wisdom was to buy it fresh and smoke it as soon as possible. I have tried it both ways, and wih Virginias, Vapers and English blends I can see the improvement aging makes.