I really like this stuff, but I can't help but notice that the SE examples happen to look younger/healthier in appearance, than perhaps some of the other samples.
In combination with the fact that SE is correlated with fluid movements and alertness (signs that could be correlated with age/health), it could be good to have some older/unhealthier looking SE samples?
Good points, and good find; I can definitely see alertness and fluid movements (my skills need improvement before I can say how strong the SE is!)
Yeah I agree with your correlations on age and Pi/Pe use. It makes sense, as our 'worldviews' will inevitably grow, whilst our ability/desire to explore potentially somewhat reduces.