Overall favorite = LSD
Phenethylamine: DOC (or Mescaline but only done it once so much less experience).
Tryptamine: 4-AcO-DMT (or DMT)
Stimulant: 4-FA/amphetamines generally.
Dissociative: Methoxetamine, if I were diagnosed with a terminal illness I'd spend my last days eating/snorting vast piles of it (alongside lots of LSD, DOC, DMT).
Depressant: alcohol, but downers are generally the least desirable drugs for me. Anything good they can do either weed or opioids do better, & cleaner - but I still love beer & whiskey.
Opioid: Opium
Cannabinoid: Hashish, wish I could find it more often but oh well I have awesome weed all the time so at least there's that.