Most pwBPD that I know are heavily into drugs. I only do so a few times a month (aside from pot, adderal and caffeine, which are daily), but I have quite a few I'll partake. I ######6 love crazy drugs. If you don't, why? If you do, which and why?
pot - escapism at its finest.
mushrooms - The finest healing introspection I have found.
25i - There is no happier, more exciting and fascinating psychedelic in the known universe. They colors are wild, and sex on it is more amazing than X could ever dream of being.
DMT - I can't be sure if this is actually a portal to another world or if it is only in the head, but either way, the experience is the same. Who doesn't like dancing 4d shapes and extraterrestrial encounters?
Ayahuasca - I have a shaman friend. Those journeys cannot even be explained.
Mescaline/peyote - same as ayahuasca, just a different flavor.
Adderal - I have to overcome my procrastination somehow.
2ci- This is actually used experimentally in therapy. It lowers the barriers between the subconscious and the conscious. I deal with things I previously bottled up and enjoy the vivid colors. Also: sex.
Caffeine - All day; all night.
Alcohol - Meh. I could take it or leave it. It has more to do with flavor than anything else. I don't get drunk like I used to.
Oral or smoked opioids - Kidney stones; nuff said.
X - Get a oral on X just one time and I won't have to explain this to you.
Downsides: With how I moderately use, the only downsides are assholes that want to lock me in a cage for what I choose to do with my own body. So far none have gotten me. I suppose the come down can be a little frustrating on some.