By far, the most interesting aspects the Yu-Gi-Oh manga are the first 7 volumes, which are an interesting cross section between a gambling and horror story. This series really hit the ground running. The story then goes on to arcs that would be familiar to those who watched the anime, but probably has a better ending than the anime that really gets into the backstory and lore in ways the anime never really touched or explored. I definitely recommend the first 7 volumes for everybody. The duelist portions are best for those who want to experience the anime with a slightly darker take on thestory. The millennium world is good for people who watched the anime attentively and want more details.