Dude! you have Ayahuasca available where you live ? That is unbelievably awesome ;DAyahuasca and marijuana are the only substances I will do from time to time.
I am only planning to gather the cash to be able to, at some point, go to some country where shamans make proper Ayahuasca, so I can have a taste :
Other than that I may try Amsterdam, and that Uniao Do Vegetal, but that might not work so easily
Anyway back to business: I do not smoke cannabis, nor tobacco (well rarely I will puff a hookah) and I don't drink alkohol.
I am however a strong supporter of entheogenic substances (peyote, ayahuasca, psilocybin mushrooms, and salvia divinorum) precisely BECAUSE I believe they improve certain abilities, which from what I see, we all like in these forums ;D
Salvinorin actually induces a very strong dissociative experience, leaving the body and exploring other dimensions, in a very visual experience, unlike everything I've seen before. I imagine Aya is even more out there, and both help a traveller unlock much more of their potential.
As you said recreational drugs can have negative effects, but proper entheogenic herbs and potions can just boost our progress miles ahead of just regular practice. It's like with professional athletes, the proteins, vitamins and carefully selected supplements they take, in order do help them perform at their best ;D