This is a perfect description of my musical niche - both my listening habits and my own attempts. My music doesn't try to reflect any psychedelic experience as I have almost no such experience myself. I love the futuristic aesthetics of certain subspecies of full-on and progressive, the robotic beats, various metallic/sci-fi/alien sounds and textures, spacey melodies and this is what I'm trying to recreate in my own music. I don't actually pretend to make psychedelic music but since the artists/subgenres that inspire me are covered by the umbrella term "psytrance" I use this word to tag my own music as well.
The "psychedelic" melodies are something really problematic. I've heard a lot of attempts at making a psychedelic melody, people often use unconventional scales/harmonies or chromatic intervals to create some psychedelic effect. This often just sounds musically wrong to me to the point that I just can't stand it at all, maybe because my ears are tuned to traditional European scales way too much. I'd rather listen to something completely unmelodic, some tracks consisting of trippy noises without any obvious melody may still be very captivating.
Anyway, another great sci-fi trance track. Well, sci-fi cowboy trance