I wasn't going to do this, but it looked so pretty on other people's websites (I think I saw it first at wolfangel's), and then I actually really liked the answer that it gave me, so I thought I'd throw it out there after all. Because, as I said, for once I'm not some boring kind of rule-enforcer as I always am in the Myers-Briggs universe!
I thought about pasting the definition in here, but it's really long, so if you're interested, you can go check it out at the link above. I will say that I think it underestimates my introversion - I talk plenty, but that doesn't mean that hanging out with people doesn't ultimately wear me out (which the results suggest it doesn't - it tells me that I need to remember that other people like some down time alone! heh). Plus I think that it's kind of a trick to be high in trust but low in empathy. But still, an animated architect, who likes concrete things and things to be orderly, but is also interested in style and aesthetic, is a much nicer result that the boring bureaucrat that ISTJs look like.
Take the test yourself here.
(Yes, I am supposed to be working right now, why do you ask?)