Welcome. I'm also very new around here

In addition to what fractal enchantment said, I'd like to point out that cannabis has more potential than to just make you feel good, sativa-dominant strains in particular. It changes the way you think, and many people find that it's very effective in enhancing creativity. I also feel cannabis is very meditative, and allows me deep pondering and understanding of different things.

Also, I don't think the claim that amphetamines "mess the brain up" is a reasonable one. Amphetamine is helpful to "normal" people in the same way it is for people with ADHD - it enhances their mental capabilities and helps them get shit done. Paul Erdos, one of the brightest mathematicians of the 20th century, used amphetamines to help with his work. After winning a bet with a friend who bet him he couldn't stop using for a month, Erdos said that the world of math had been set back by a month as a result. Sure, it's possible to abuse amphetamines, but that is the case with most things in life, and does not mean they are inherently harmful or useless.