The aroma of a Christmas tree is often regarded as one of the most pleasant scents associated with the holiday season. However, the perception of which tree smells best can vary from person to person. Some may prefer the scent of a freshly-cut pine tree, while others may prefer the aroma of a fragrant fir tree. Still, others may enjoy the scent of a Douglas fir or a balsam fir. Ultimately, the choice depends on personal preference and what brings you the most joy and comfort during the holiday season.