I'd like to work my way through PIHKAL and TIHKAL really, although doing the hard work before hand will take some time.
Starting with 2C-D, DOM, and some of the lysergamides for my first attempt, and for that matter in the former two cases, first times trying any of the psychedelic phenethylamines/amphetamines, and in the other case, because for the large part I know there I've got about as much chance of ever seeing any of them as a frog would have of having a good day holidaying in a microwave, although I have been meaning to get hold of some LSAz before it gets banned here to try it.
Not going to be easy or forgiving work though, and no mistake. I see no reason to aim for acid itself, that can be found, but the likes of AL-LAD, PRO-LAD, PARGY-LAD and similar, I imagine if anybody has any, they aren't spreading it around by the biblefull
Aside from the various inactive substances Sasha Shulgin (RIP, a true loss to the world, not least his wife

created), about the only ones I really think I want to give a miss are 5-MeO-AMT,5-MeO-DET (although I loved AMT), and the various Pyr-T derivatives, those sound not only unpleasant, but quite alarming in their effects. 5-MeO-AMT sounds like absolute bollocks to me.
Ibogaine is another I'd like to try, I just got done reading xorkoth's recent trip report and thats made me all the more enthusiastic about the idea.
And another one, is xenon, the heaviest of the noble gases, bar radon and anything transactinide-y.