Tobacco
Weed
Hash
Hash oil (whoa!

)
Alcohol
Absinthe
Codeine (twice in one sitting, snorted; didn't do anything and didn't care to try again)
Heroin (once, snorted; didn't do anything and didn't care to try again)
Oxycodone (twice; liked it, very good sleep aid)
Tramadol (once)
Clonazepam
Temazepam
Diazepam (once)
Fluoxetine (once or twice, to supposedly counteract MDMA neurotoxicity)
Paxil (once or twice, because why the hell not)
Cocaine (but I haven't touched it anymore after I found out that I prefer being sober to being on coke)
Ritalin
Amphetamines (sometimes I like these a bit too much, but they make me too introverted

. So I generally abstain.)
Dextroamphetamines (once or twice, over the years)
Crystal meth (twice, over the years; what a strong drug...

)
GHB

(one of my favorite drugs ever, but then it's easier for me not to get hooked because I get bored of the effects if I do it too much)
MDMA (first 'real' drug I tried; did it a whole bunch of times over a period of a month or so, now very rarely touch the stuff)
Methylone

(I get way more out of this than I get out of MDMA, personally)
Mephedrone (once)
Alpha-PPP (once)
MDPV (once, so far)
mCPP (some piperazine that felt a bit like weak MDMA but gave me a bitchin' headache that lasted twice as long as the high itself; never touched it again)
2CB
2CC

2CD

4-Fluoroamphetamine

LSD (lots and lots and lots of times)
Mushrooms (many varieties; I've also done shrooms + Syrian Rue twice)
n,n-DMT
DOB (I really like using this as a 'launchpad' for LSD/2CB/K/4-fluo/MDMA/Methylone psychedelic expeditions, as it synergizes with any or each of these quite nicely. DOB by itself doesn't have the 'kick' for me to really trip balls on it - not unless I want to risk ODing on the stuff, and I don't)
Salvia (or at least, I tried using it but it didn't work for me)
4-HO-DiPT (or at least, that's what I think the name was, not totally sure. I was definitely sure what I was taking when I did it, though.)
Ketamine (R & S both, racemic mix too. I overdid this a bit, so I don't really do it anymore)
DXM (my favorite drug, probably, out of all the things in this list)
N2O
Cyclizine (more trippy/less drowsy variant of dramamine which used to be sold in the Netherlands; tried tripping on that and lost all interest in deliriants. The spiders, man, the spiders!)