First post from a longtime lurker, past experience primarily with IV sadly (jumped straight from weed to IV hydromorphone by sheer fate) but happily in recovery

I have 3 cats who tell me all about their drug experiences
Overrated:
1.
IV crack: too impure; also it seems that smoking is much more euphoric, which my cats never tried. None of my 3 cats at home ever got much out of it, and they certainly did not enjoy the vinegar shot (led to an abscess at one time).
2.
IV oxycodone: why, when you can have hydromorphone?
3.
Heroin: again, why H when you can have hydromorphone? Access to quality heroin takes a lot of leg-work.
4.
IV Meth: mixed feelings. Yes, my cats say it feels great, they like how their brains start tingling. Purity is often good. But the compulsive re-dosing and the physiological damage from repeated use just makes my pet cats scratch their heads in bewilderment and shame when they crash. When they binged on IV meth, it was so shocking to their feline brains that they had the first epiphany that drug use was killing them. They stopped doing IV drugs after that, especially considering how anxious they are when sober.
Underrated:
1.
Tramadol! As someone else posted, I would take this with me if I had to take one drug on a desert island. 100 mg/day with no dosage escalation has been by far the most effective anxiolytic and antidepressant for my cats, or so they say, and tramadol even has empathogenic/talkative effects. Sex on tramadol has forced me to break up multiple orgies, because they were having marathon sessions with each other.
2.
Clonazepam: my three cats at home suffer from severe anxiety/depression/low self-esteem, and 0.5-1.0 mg clonazepam PRN has changed their lives, even removing their need to self-medicate with opiates and other drugs.
3.
IV hydromorphone: often criticized for its short duration, but that 5-10 second rush is incomparable! This drug was my 3 cats' DOC, although it eventually lost its magic after about 3 months of daily use.
3.
Cannabis: if you don't have paranoia or anxiety, cannabis is one of the safest recreational drugs and seems to attenuate a lot of problems during stimulant comedown, esp. if combined with low-dose benzos.
4.
Mushrooms: one of my cats had a bad trip (not nightmarish though), but the other two cats experienced pure nirvana for hours. Revelatory.
5.
Mirtazapine: far and away the best antidepressant out there...side effects include appetite increase and somnolence. Many of us who have done drugs (esp. stimulants, which are NOT my DOC) would kill to be able to pass out and binge eat after staying up for 3 nights.
6.
Propranolol: My cats having the anxiety that they have, propranolol really helps with the tremors and surging pulse during anxiety attacks. Non-addictive and not scheduled. Almost as effective as benzos in combating the adrenaline that comes with fear response.
7.
Codeine: not used recreationally, my cats save it for sex so they can last longer in bed. Not that they even use the bed most times...
8.
IV/IM Ketamine! (from the veterinarian): my cats really had some special experiences on this one during surgery. The first time since shrooms that they had felt like they were beyond all space and time. And music!