Good for you. It's quite satisfying to discover one's hidden aptitude to what is widely considered (in the US, at least) a difficult subject. I had a similar, if not as dramatic, experience with Physics. Unfortunately, your experience does not generalize to those who are not natural at math (which you only discover by trying hard, of course). I have observed several people who were just as motivated to learn math deeper, but gave up after realizing that math just doesn't make sense to them as much as to others, and settled for a B-grade knowledge. The same story applies to nearly every subject area: music, language, biology, art, programming, electronics, HVAC, you name it... Hence my standard advice to try as many different things as possible before picking one or two to spend the proverbial 10k hours on.