oh man.. If you haven't tried LSD yet and MDMA was so profound for you, you'll be getting one deep ride there! Just be sure to have good conditions around - it is a must there and can make a difference between a truly spiritual experience you'll never forget in your entire life vs horrible chaotic mind-frenzy of the worst kind. In my case it was so profound I kept doing it every month for years, doing everything from meditation and pranayama techniques (because you 'get' the actual effects in real-time - if you have basic foundations covered of course...) to every possible raja yoga practice. It works incredibly well when you start understanding how it actually works. My wildest experiences were in natural caves or top of the hills during night-time, with very limited number of friends who were also well versed in it. IMHO it's by far the greatest drug ever conceived but also unfortunately, not for everyone (especially nowadays that so many have psychological problems). It's not a 'good-feel' drug, though it can feel great sometimes. It's more a sort of experiential soul-searching tool that can allow you to see the deepest hells and highest havens hidden in the core of what old Egyptians called 'our star' (the center of our being/soul that can for the lack of better words only be described as 'holy'). I could go on and on about this one for months, so let me just say this: unimaginable unforgettable true experience that, if properly handled allows humans to truly meet themselves.
One final note: the trip is long and should be taken as such by default, because that time is needed for us to absorb everything and then slowly... sloooowly come down to earth. Don't take downers to 'come-down' if at all possible. Go through it instead even if it might not feel always 'nice'. And don't fall for the idea that you can't fall asleep or something. Use that time instead because it's fucking precious. And once more.. don't do it just by the way. That is by far the most important - be prepared and have a lot of time at your disposal. You don't want finding yourself looking at a watch or something because it will fuck you up if you do.
Good luck and I hope I didn't bore people with this too much :)
