Here, allow me to foist it upon you: Go here and click the DO IT button. It's fun, I promise. Then paste your results in the comments section, below.
KIDDING. I mean, go ahead, if that's your thing, I'd love to know what your type is. But if you flinched at the thought of publicly broadcasting your results, there's a good chance we already know that your first letter is an "I" for Introvert.