Bored. Took a test.
Here are the results:
Responsible, punctual, and thorough, you are temperamentally well-suited for long-term planning and execution. You like to familiarize yourself with the facts and think things through, and you tend to shake your head at people who neglect the importance of committing properly to a goal. Once committed, you tend to find it easy to muster the discipline and patience required to stay the course, even in the face of distractions that would make others change directions or abandon the endeavor. You tend to come across as serious and you are generally not one to wear your heart on your sleeve. But as those closest to you have probably seen, you also have a sentimental streak and a wry sense of humor underneath the stern facade. Because you are so diligent in approaching your projects, you may at times be caught off guard by sudden changes which arise in a flash and which are hard to guard against. Steady and purposeful, and endowed with a good deal of common sense, you exhibit an enviable thoroughness and attention to detail that makes you well-suited to taking on long-term commitments and leading them to triumph by way of the sure and steady approach.
No surprises. :-)
Oh, and the corresponding Wikipedia article for ISTJ.