When I was 1 and 2 I could access the most marvelous hallucination-spaces at night. By the age of 3 that went away and never returned.
My favorite drug has to be ketamine. once had five grams of the hydrochloride and smoked the base. Typically a starter of 40 mg, then as soon as I could handle the pipe again, an 80-mg rip. Indescribable, but i never went all the way out for long. Memorable experiences include being shown the underside of Reality.
But the furthest "out" I ever went without anesthesia being involved was my first DMT breakthrough. I'd smoked 25-30mg at a spell to acclimatize myself to the ohh-SHIT panic mode of entry followed by the Giggles, which were like nitrous but somehow better. One day i loaded 60 mg, vaped it and *just* had time to set down the pipe. I only remember fragments after that ... the metaphor that comes to mind is a tennis ball in storm surf at night, or that scene in Star Trek 6 where Sulu's starship did a header into that massive fiery shockwave (my God. ...shields ... SHIELDS!) ... submerged and utterly adrift most of the time. At the start of the trip i had a most vivid impression: I was suddenly channeling a Mesolithic shaman from perhaps 40 thousand years ago (exult: awake at last!!), standing defiant guard at the edge between the campfire and the Spirit/Abyss in which the monstrous Others moved. But that was my one single experience of "presence of other" during a psychedelic trip. There was also a brief impressopn of having entered the throne room of the Transcendent, who didn't invite me but tolerated me, a sort of combined "you were not invited" and since you are here, I will be hospitable". But that sense of having toddled into Dad's office uninvited stayed with me, and it was quite a few years before I dared sample DMT again. Since then, that spiritual/communication sensation never did recur.
Recently i broke a t-break from weed, and that night one solid rip of hash sent me into an unusual and solidly trippy space. Almost passed out on three separate occasions, and had to surrender twice to a brief ego-death/psychic orgasm sort of experience. A rare treat. cn