I never smoked weed as a teenager because I had heard horror stories of people spiking illegal drugs with really horrible stuff. I have no idea if those stories were true, mostly likely they were exaggerated by law enforcement, but it worked to make me too much of a coward to try it.
Because I never smoked weed, I've grown a borderline-irrational hatred of it. It always felt like when my friends in high school started getting into weed, they would become insufferable pseudo-intellectuals who thought they were very deep because they watched a few Carl Sagan or Alan Watts videos. I hated how stupid it made my friends and I hated how it seemed to ruin their ability to remember things.
It's not clear how much of this is because of the weed, or just the fact that teenage boys are often just insufferable, by the way I remember it (which doesn't mean it's accurate) is that weed made all my friends in high school into pretentious morons.
I'm kind of glad that I never got into it now. I'm insufferable and pretentious enough as it is, I don't need chemicals to help with that.