I always find it odd that, among the many things which are quadra values, positivism and negativism are not quadra values. If I ever see anyone running around with pure inspirational kitsch "Esther Hicks-style" (thanks @Shazaam) I tend to be repulsed. Surely this is the kind of thing that should be a quadra value. Now, positivism and negativism are not quite the same as optimism and pessimism, but it seems to somewhat correlate. What would be more important for determining true naïve manic optimism, traumatized depressive pessimism, and the healthier versions of the two? I often think: probably only what's within a person. As much as people don't want to admit it, this is probably the real defining line between the "good guys" and "bad guys" of life. Life is not something for entertainment and amusement and once you realize that you see how much more valuable it really is.