I voted for mixed, as it includes cannabis, which is clearly the greatest. Cannabis can be psychedelic, stimulative, sedative, dissociative, and narcotic analgesic, all at the same time. Weed is life and it makes every situation better.
My fist stands high, erect, and ungreased for the author of this post to carefully place his/her ass upon. It is your throne for such a stupid quest of 'knowledge'. Are you a government agent? What do you hope to gain with this new knowledge? 11,000 years of human evolution since the last ice age has brought us to this???
I think that greatest drug is dxm... Because when you are high enough you can have effetcs what ever you want from it. Like once i was just lying in my bed and then SATAN did come to my door... He was smoking high and then he offered me some lsd and then i was tripping like i would be in acid trip... (Weird i know) Dxm is also quite safe and its easy to get...
I think it depends on what you are using it for. Each category of drug has times when it is the ebst sort possible, and times when it will only make things worse.
When I was a kid around 16 to 21 I would of said Psychedelics hands down but now that I am older its Opiates no questions at all a good Herion high beats all other highs out there !!!!