I find this thread fun, but it seems to me that sweeping conclusions are being made on very little data. I seriously doubt that most extropians are first-born, nor that any one particular Kiersey temperament sort is drawn to transhumanist memes. If anything, I expected to find the more adventurous minds drawn to it, rather than the more rational. The sample size is dreadfully small considering the full data set, not to mention the new groups of people that will be attracted to this in the next few years. I also see a slant due to the fact that you are conducting the research on an internet list that has gone through several membership fluctuations and that probably does not fully represent the membership of ExI at this time.