Bleu de Chanel is probably one of the most recognizable mens fragrances for a reason, it just smells classic. The discovery set is really useful because each version of Bleu is different enough to warrant a comparison. Th EDT is much more casual, citrusy, and masculine whereas the Parfum is the most powdery and floral to the point of smelling like a woman's perfume. All of the Bleus have pros and cons to each but for my taste I think the EDP is the most balanced albeit with a duller top end and I would see myself using it far more often. Again, it's worth trying each.