My husband and I are both INTJ's. Knew there was something "special" about you. INTJ's aren't all that common, though they might be in the genre. Sometimes the circumstances you're taking the test under influence how you score, like in a work or personal environment. Or you might not be a strong J, one closer to a midline with P. Me? I'm pretty hard in each category, though I'm trained to do "S" level work when I need to.

But yes, people buck the trend. I think an ISTJ reads a lot of sf, that it doesn't have to be that intuitive N at all. And my sister is ENFP and she reads it. A lot. She reads a lot of romance too, but so do I. Go figure that one.