polly, actually, the order you have those initials in, is a bit.... odd--- usually (but not always) it's either LGBTI, or LGBTQ, but that depends on the context. the Q is NOT QUEER,
by the way, but questioning, i.e. questioning either gender or sexuality, who may not have any idea where they fit on the gender or sexuality spectrum, or who feel no need to fit anywhere. gender blenders, gender fuckers, and gender benders and queer youth usually self-define as questioning, but if someone is exploring their sexuality but do not think they are bi, then they might identify as questioning.
queer, as you know, is a somewhat innocuous umbrella term used by lgbtq people under 60's for anyone in in the second set (LGBTQ). intersexed people (formerly known as hermaphroditic, but is now considered passe/offensive) usually chose to see themselves, in large, as a separate from the lgbtq community, although it is not universal, their concerns do tend to overlap somewhat with queer folk, most frequently with trans folks, for the reasons kitten said. there is an overlapping history as well, since at the turn of the last century (circa 1900), anyone you would now call queer was labeled an "invert" these growing initials (lgbtiq, etc) are just a symptom of these histories separating themselves out, and those people clarifying and defining themselves. i could go into more depth-- particularlly about the history intersexed, and it's union with trans history but it's a bit complex, and would take up a bit of space.
as for lsd experiences, kitten, i hallucinated quite a bit-- but i do that on a high dose of liquicaps. i'm kind of a light weight in that way. :/ for me it's mostly patterns on surfaces. or perceptions of those surfaces. the 2 ways i most frequently hallucinated were pattern based.
case one: it was as if someone took a grid of christmas lights over the surface of everything i could see. at the corners of the squares in this grid were the lights, whose color was red, green, blue yellow. but these patterns were always consistently spaced. imagine you were sober looking at a chain link fence with a dense hedge in front of it, and on that hedge you would see little berries. but you would see no pattern. on acid, i would notice that all of the places the chain link intersectected would be marked by those christmas lights, and on the bush of all those berries were spaced equi-distant, and they looked like those christmas lights as well. i would also notice that there was no interruption in the pattern between the different textures. all things, living and inert shared this unified pattern.
case two: if you've ever seen someone who has a textured wall (not popcorn ceilings), it's that kind of wall or ceiling that has a kind of barely raised surface of no particular pattern. imagine seeing a photograph of that surface repeated over the surface of a movie screen, now imagine it double exposed, but with both of the patterns moving independantly. the photos are so small that you can barely pick out the surfaces. together it sort of takes on the appearance of a wave. now, imagine this film of ours projected on a room. visually that film would make it appear as if solid surfaces were moving like waves. although they were solid under your hands or feet.
occasionally when i was coming down it was pretty innocuous, it was as if the room was tinted, but the color would change every few minutes.
visually i've had some pretty interesting trips, the first time was my favorite: i was sitting on a friends roof with some friends at a party in the mountains, talking, etc, i became fascinated with the shingles which were round, and white, as the acid really hit, those shingles became more ornate, looking like delicate round paper doilies
, with those christmas lit bright dots, evenly spaced on the doilies intersections, holes or edges. as i watched, those doilies began to move, like waves, the edge of the roof being like the shore, some would wash beneath me, gently lapping at the shore. it was so very beautiful.
other times i would stare at black and white marble tiles on my dorm floor, and art would "bleed" in from the cracks, filling up the tile, only to fade in time for the next picture to take it's place.
as for bad trips, i had a few. on that first trip after the doilies, we were heading back to town down a long mountain road, the sides of the mountain looked like skinless flesh, the christmas light dots were the pupils of eyes, opening as we passed. pretty disturbing, pretty disgusting. the bad trips were all along those lines, usually involving eyes appearing on surfaces, the pupils of which, again were those chrismas light/dots.
those where my experiences, and i've heard of people seeing music, but i never did. sensation wise, it felt like feeling connected to every living thing in the world, then later feeling "plastic" as if i was feeling all sensations second hand, and then when coming down, it was just jaw clenching tension, but i think that acid had some speed in it. good acid was smooth and would fade as subtly as it started.