I have extensive experience with psychedelics including LSD, peyote, psilocybin mushrooms, Salvia Divinorum, 2C-E, aMT, 4-HO-MET, 4-HO-MiPT, 5-MeO-DALT, and 5-MeO-MiPT.
I have had mostly positive experiences. Once after having had at least 100 great trips on LSD, I heard about an acquaintance who'd had a traumatic experience. I was thinking about this, while coming on to a substantial dose of LSD, wondering what bad trips were like. In that moment I looked into the mirror and saw my face contort into a hideous mask, and enter into a state of madness that lasted for some months. I remember the trees crying and losing the ability to perceive color for over a week. I'd hear my parents in the other room talking about how insane I'd become, and discussing the immanent arrival of men in white coats to take me away. I'd rush into the room planning on confronting them, only to find them quietly watching TV.
I knew I was crazy and felt my only way back to sanity was to continue taking the acid until I made it out to the other side.
I wish everyone the best and hope you'll play safely. I must warn you not to be too curious. Our curiosity calls experience as do set and setting. The love, beauty, and even mystical knowledge are worthy experiences these powerful substances can open us to. But the darkness and madness are terrifying and ugly worlds best avoided.