I did some research on how the myers-briggs types and the four types on this site interact and I found some interesting stuff there, too. I always tend to go for the sanguines. We balance each other out, but also irritate each other slightly. People are so complex and I love looking into stuff like this.
Having taken the extended test and chatted with a licensed practitioner, I discovered myself to be INfj (softer on the f and j; modes depend on the situation). It fits various elements of my personality, others less so; I don't consider myself to be much of a psychic, for example.
I agree very much with Leyden's post on this topic. Self Knowledge and awareness are akin to spiritual growth. In knowing myself, faults, limitations and talents I am more able to appreciate God's divine mercy in my life.
I just bought that book "The Temperament God Gave You" and looking forward to reading it!