I actually stayed away from everything but pot and beer when I was young, though I did eventually end up taking acid about 20 times over a 2-3 year period. I stopped weed for about 15-20 years without even realizing I was doing it until I was 4 years in.
At this point I have a need for opioids. I've been taking them since 1998 following a cervical laminectomy (5 levels). I take as little as I can and I've never been close to addicted. Most days I have a problem I can keep it to 5mg or so. Now that medical weed is legal here I've been using some strong indicas in place of the narcs. In truth, the cannabis causes me as many side effects as the narcs, so I go back and forth between them.
I have also seen people who did drugs and couldn't stop, and I have a couple of acquaintances that have serious gambling issues. I could see the predisposition in all of them. If a dude does a line of coke and then goes Scarface until the ATM says no more, there's a problem. Same with someone who goes to Atlantic City to gamble for the afternoon and next thing he knows it's 4am.
I also have to say that the number one killers of people in my life have been alcohol and tobacco.
Wow - we're like mirror images, almost.
All through my youth and even today, I've never been able to do much more than lightly dabble with booze and pot.
Both are just too strong for me, I turn into a blithering idiot on a single glass of wine, and a single bong hit can either put me to sleep or make me too paranoid, or I wind up staring into space for five hours.
For me, opioids are particularly unpleasant, too.
On the other hand, the moment I discovered cocaine, it was like I'd discovered Mother's milk.
At first, back in the 70's, I just dabbled. It was too expensive and I just never was very interested anyway, but it was pleasant.
Then I married a Hollywood starlet who was a raging addict, I went full blast, eventually "graduating" from coke to crack in a ten year nightmare journey to Hell. It was the 1994 Northridge Quake, which wiped out everything for me, that served as a signal to stop, or die.
By 1995, after falling off the wagon a couple of times, I was clean.
Still a lightweight on the booze and pot thing, I just am not cut out to be a pothead, LOL.
I occasionally have a tiny nibble on an edible to help insomnia.