There is no definitive answer to this! A better question is what kind of cannabis do you want to grow? Those who are looking for an uplifting/energetic effect will choose a sativa strain, while those looking for a more relaxing/heavy effect prefer an indica strain. Most new growers are also looking for a cannabis strain that is easy to manage, forgiving of grower’s mistakes and rewarding in yield, such as Wappa or Durga Mata.
Whatever cannabis seeds you choose, always ensure that they buy them from a trusted and reliable source. An established cannabis seed company, such as Paradise Seeds, will produce strains through its in-house breeding program. This ensures cannabis seeds come with high germination rates (in the case of Paradise this is 95%+) and stable genetics (which will produce plants as advertised). Like everything, you pay a bit more, but in return you get a guarantee of quality.