I spent Saturday at a workshop that helped define personality types based on the Enneagram personality typing system. You can find more information on it at here. From there, you can go to the enneagram worldwide link and actually register to take the test and get more information.
The couple who bought my fourplex invited me to attend this workshop. It was fantastic. I learned so much about myself and about the personalities I clash with and why.
I proposed to the hostess of the shop that we start an Enneagram singles group. I think it would be awesome. She really liked the idea, so it's just a matter of whether I can squeeze it in and commit to it.