Oh, I don't think Astrology is what makes us who we are. If there's any truth to it (and by my experience it seems like there must be at least a little), then my personal opinion is that God made us, and God made the stars, so if He chose to write something there, that would be entirely possible for Him. ^^
Not that you'd have to agree with me, just try not to shoot me down about it either, please. ^^
Knowing you're a Gemini, I'll have to watch out for you switching moods or interests on me... XD