The main reason I smoke weed is because before this my views were tainted by societies influence on my ego. I was one of the lucky people freed from religion and the traps in my mind that prevented me from questioning my beliefs. Marijuana itself has many nutritients & omega 3 fatty acids, many people have claimed to be cured from different diseases by ingesting THC oil.
I can't have opiate peptides found in gluten [wheat,oats,rye] & casien [milk,dairy], because they cause a build-up of peptides which act like opiates on my body. I find that using LSD [synthesize from ergot, a fungus that grows on wheat,rye,&oats] cleans out my system of these peptides & makes me feel a lot happier, so I do use it occasionally.
I've sold DMT to a few people but I've never smoked it myself. I want to but I'm waiting to have an actual shamanic experience.