Well, the Mute Trubadour posted his Myers-Briggs Personality Type: INTJ. Mine is E or I NFP. I pretty much split right down the middle of the Extrovert and Introvert qualifications. What is interesting is Human Resource Professionial is a career option for both.
If you don't know your type there is a basic test on the career guidance page. There is also a more comprehensive test at Keirsey.com..