For me LSD can sometimes have a "techno-futuristic" feel associated with it and Psilocybin can feel very deep, earthy, and historical. What themes occur when you guys experience certain classical psychedelics?

I have similar associations with LSD and psilocybin. LSD makes me feel like a genius, mushrooms make me feel like a buddhist monk. I don't even have a theme for DMT though... Infinity perhaps?

From my perspective:

LSD: Gender neutral, stimulating, Trans/super-human, deeply mental, enhanced, moderate ego disturbance, mostly controllable (factoring in dosage).

2-Ci: very similar to LSD, although "something" is missing.

DMT: Male, female, or neutral qualities, over-stimulating, Alien, cosmic, extra-dimensional, spiritual, minimal controllability, major ego disturbance.

Aya: Mostly female, stimulating-sedating, alien and/or earthy, extra-dimensional, highly spiritual, major ego disturbance.

Mushrooms: male qualities, sedating, earthy, ancient, extra-dimensional, spiritual, minimal controllability, minimal-major ego disturbance.

Mescaline: Male, stimulating-sedating, dream-like, earthy, highly spiritual, familiar, major ego-disturbance

Salvia: Female, magickal, dark, extra-dimensional-yet-familiar, spiritual, minimal controllability, major ego disturbance.

Nitrous oxide: stimulating, deeply introspective/mental, highly euphoric, enhanced, minimal controllability, major ego disturbance

Opium: sedating, dream-like, highly euphoric, moderate controllability, minimal ego disturbance

MDMA: stimulating-sedating, highly euphoric, social, empathic, mostly controllable, possible ego-disturbance and/or ego enhancement

Ok, lemme have a go. With LSD, to me it's a lot of electric imagery that tends to be displaced symmetrically along four quadrants of a grid. It can touch on the fantastical side of things too.

Mushrooms are very funky. They were the first psychedelic I ever took, and I've always thought that it's kind of fitting that the mushroom looks the way it does. Mushrooms are odd, oblong, curvy and droopy and that's kinda how the mushroom trip presents itself to me. It can have gnomish and other magical kinds of feels. They are very earthy, and on my last mushroom experience (which was a few years ago) I found myself in a rather spacious, subterranean DMT-like crystal cavern.

DMT...oh boy here we go...DMT has themes that include but are certainly not limited to futuristic, technological, mechanical, energetic, extra dimensional, organic, archaic, sacred, mystical, magical, alien, astrological, spanning imagery and motifs from the vast animal and plant kingdoms, cellular, holographic, and just all-round themes that defy explanation and are simply special.

Salvia brings me back to kindergarten...only knowing even less. I consider it to be hypodimensional, as in I feel that I tend to regress back into the second dimension instead of going up in dimensions as with DMT. Conveyors and automated motion are predominant themes as is the multiplication effect it can have on visuals (like sets of teeth everywhere). Salvia also has the tendency it should seem to allow one to experience the consciousness of something else entirely whether that be an animal, plant or any random kind of inanimate object (i.e. I've been the couch before with all of the thoughts, feelings and loneliness that comes with being a couch).