I just took the Kingdomality Profile, which is a lot more fun and interesting than the Keirsey. Here's what I got:

     Discoverer
     Your distinct personality, The Discoverer, might be found in most of the thriving kingdoms of the time. Your overriding goal is to go where no one else has ever gone before. Regardless of the number of available natural problems to be solved, it is not unusual for you to continually challenge yourself with new situations or obstacles that you have created. You are an insatiable explorer of people, places, things and ideas. You thrive on constant change and anything new or different. On the positive side, you can be creatively rational as well as open minded and just. On the negative side, you might be an impractical and indecisive procrastinator. Interestingly, your preference is just as applicable in today's corporate kingdoms.