I've noticed people grouping Astrology in with things like MBTI, and that's giving Astrology far too much credit.
MBTI and others aren't something you want to put too much stock in, but there's a major difference between these and Astrology.
Astrology is prescriptive. It pretends that you're locked into one of twelve personality types, because as we all know there are only 12 types of person across the 7 billion of us.
MBTI and others are descriptive. Your answers to questions are used to describe your leaning in various aspects, and they tend to acknowledge that that's not a complete make up of your personality. Everyone is comfortable with saying they're more introverted or extroverted, and MBTI just does that with an additional 3 times. I'm more introverted and thinking than extroverted and feeling, but I doesn't mean I only exhibit the former.