So my latest obsession is learning about all things personality related.  It was something which I felt it would be interesting to look into in more detail based on my experiences with my Happiness Project.  In short, a major finding is that although we can all move the needle in a more positive direction, what exactly leads to a happier life for me is probably not identical to what would for you due to our individual differences.  Starting out that project, I remember reading Gretchen Rubin's argument that one of the keys to happiness is self-knowledge, and she says that "we can build a happy life only on the foundation…