mdma
Seriously though: i don't think there are a lot of people who have tried them all.
MDMA>6-APB>4-FA
6-APB>6-APDB (close call, though)>5-APB (the others I haven't tried often enough yet and don't have my notes with me so can't really rate them at the moment.)
Seriously though, sekio, I think you're underestimating the amount of RC enthusiasts on this forum and how very popular these compounds are. I've tried most (but no, not all) of the compounds listed in the OP at least once, though I'd have to consult my notes to really say which one I liked best out of just the benzofuran family. I enjoyed them all quite a lot, which is how I wound up trying so many of them. I am aware of fellows who have indeed probably tried all the compounds listed in the OP; whether or not they'll chime in is anyone's guess, so let me throw in my two cents here:
I've tried 6-APB and 5-APB enough times separately to say I definitely prefer 6-APB, as I find 5-APB to be less psychedelic, less sociable, more introspective, and sedating almost to the point of making me sleepy. I've tried 6-APDB at varying (lower) dosages and found it very enjoyable and very MDMA-esque (it's rather like a quicker, more intense, and perhaps slightly more psychedelic version of 6-APB). Although I enjoy the benzofurans very much, I find that they take quite the toll on my body, even when I take normal precautions against empathogens/ entactogens (ie, taking my vitamins, staying hydrated, eating well, blah blah) - the hangovers can be terribly harsh, much worse for me than MDMA or 4-FA. I find the benzofuran hangovers can cause intense gastrointestinal distress (in other words, expect to spend a lot of time in the bathroom the next day), cause nausea throughout the experience, headaches, and photosensitivity that lasts well into the next day as well. And I know we're on a trust system here, but believe me, I dose in moderation and space my doses adequately during and between sessions. I've never had such terrible hangovers with MDMA - I usually experience a major afterglow lasting about two weeks with MDMA; I'm lucky that way - no headaches, no hangover, just a little fatigue. Neither have I experienced such negative after-effects with 4-FA - headaches and dry-mouth, mostly. Nothing some electrolytes and a hearty breakfast wouldn't fix.
That's all I've got off the top of my head. I'd enjoy hearing about the preferences of those who have also had experiences with a wide variety of the members of the APB family. There's raging debate about it all over this and similar forums. I think 6-APB is going to have a tendency to win out, though that could just be because it's been around longest and sort of set the standard for the class. Also, fewer people will have experience with the newer variations that have come out, so there's going to be less basis for comparison. I think it'll be interesting to observe how the general consensus changes on which one's "best" after a few years of letting these compounds circulate.
Of course, nutmeg will never be banned... the point is more that the current legislation is indeed perhaps vague enough to ban nutmeg. (If they didn't add the "analog must have similar effects" clause, too, a whole lot of other chemicals would be in trouble -- see: GABA supplements vs. GHB, heck, even MSG vs. GHB...)
