My idea of a good time is to kick open a fireant hill and stand on it barefoot. Eweee! The ant venom is fulla antibiotics that kick infection ass, and its not habit forming. Its the original square needle in the left testicle but its cheap and works.
I actually had a prescription for cocaine (specifically cocaine hydrochloride) to relieve swelling of a broken nose in the 1990s (try getting THAT filled at your local Walgreens). Didn't care for it.
It was useful, however, because years later when the kids asked daddy if he ever used coke when he was younger, I could truthfully say "yes, but I had a prescription for it".
To answer the original question, morphine and dilaudid used to be fun...I'd watch clocks melt off the wall Dali-style, and the ceiling tiles would slide and rearrange themselves like a tetris game.
I had to take some Phenobarbital elixir for a couple of months for my stomach.
Do not remember much about it.
My girlfriend at the time once said when I would take like a half teaspoon, it was like waving a magic wand over my face... expressions and then a blank slack looking face.
After my car accident, many yrs ago, I got iv morphine.
Hands down the best ever.
Unfortunately I ended ip addicted and it took almost 4 months to wean off.
That taught me that any drugs I wanted to do had to be one-off, and I never considered injecting anything.
But I've done most, at one time or another.
A better question would have been what was the WORST drug and why.
For me, mushies were horrid I really can't fathom anyome doing magic mushroom twice!
I've tried a variety of drugs but my body chemistry fails to produce whatever it is that most people enjoy. A dentist confirmed it saying that a few of his patients require no pain killer at all.
I had some ether as a kid and it may have ruined me for other drugs. It produces really cool hallucinations but also makes you sick as hell....like being hung over and sleeping beside your toilet.