Alk
Has preety much been a constant in my life since I was 16. Peaked with occasional heavy drinking in Oberstufe (think that's the german equivalent to the final years of high school), decreased during college, but I still occasionally do it. I like both the slight tips and being smashed, but never to the point of puking or feeling bad anymore. I can no longer afford those wasted days. Aside from that, I genuinely enjoy the taste of wine, whisky and rum.
Tobacco
In my first semester I occasionally smoked when I was drinking, but it always ended up giving me the circulation & lots of puking, so I quickly quit it, lol.
Weed
My love and hate. I'm doing it regularly, sometimes multiple days a week, sometimes only every second weekend. Started with bong, meanwhile I'm only using the vape, which I love. It's perfect for whatever, chilling alone and dancing, drawing or reading manga, being with friends, at techno or goa partying, being in nature.. that weed veil dropping over my thoughts is amazing, I get pretty bonkers, but I like that. Being way more appreciative of the small things, noticing all the details in relationships, situations and the environment. Also, that improvement of music and taste... hot damn.
MDMA
Love it. Think it's not only for partying, but also for a bonding night at home/in nature with friends. Only do it like twice a year, but it's always a beautiful and to me really valuable experience.
Psychedelics
Did acid a few times, but only in moderate dosage. One time I had a vape during comedown, which made it kind of unpleasant, ever since that I'm cautious around it. But I've done 2C-B a few times, an amazing psychedelic that's mostly affecting the visuals without too deep of a mindtrip.
Kratom
For those who know what it is, I'm doing it occasionally, like once a month or so.
Uppers
Actually like Speed a lot, but only do it rarely, mostly at techno events. Sniffing a substance was a huge turnoff to me initially, but one gets used to it, boiled down it's just another way of a substance entering the body, no more weird than inhaling burnt stuff. In moderation (and with good quality stuff) it's nice for dancing and gives an incredible headtrip and energy, without much of a drawback except difficulties to sleep for a few hours.
I've also tried Ritalin a few times for straining desk work, but wouldn't do it regularly.