Which weed hits the hardest?

I'm curious to know, which type of weed is considered to have the strongest effect? Is there a particular strain that's known for its potency and hitting harder than the rest? Are there any factors that contribute to the strength of a particular weed, like its cultivation methods or where it's grown? It's important to note that the effects of weed can vary greatly depending on the individual, so what might be considered "hard-hitting" for one person may not be the same for another. Nonetheless, I'm interested in hearing your thoughts on this topic.