Someone asked me, about a year ago, if I also believed in astrology "like most New Agers do". Once I finished wincing at the term "new ager", I told them that I didn't. And, then I told them that "new age" has nothing to do with me, I'm an atheist.
I revisited the question a couple of times wondering if I actually should believe in it, though. I mean, my path really revolves around the Universe and how it affects everyone. So, why not believe in astrology? In the end, I still don't do astrology.
I'm a Scorpio. I've had my chart all mapped out. Scorpio sun sign, Pisces rising sign, Capricorn moon sign. Plus a bunch of planets in various places. The description of my character based on the very generic descriptions given by astrology is really only vaguely accurate. I suppose it would be easy for anyone to believe astrology works when the information is as generalized as it is.
At the end of the day, I do believe that planets and the sun and the moon have a lot to do with people and affect us greatly. Just not on a personality related level. I don't believe in horoscopes, or that I should be hard to get close to because I have a scorpion for a leading constellation. I am.........hard to get close to. But, not because of my astrology, it's because I'm a giant introvert. And, many Scorpios I know aren't introverts at all.
I guess I just don't see a reason to believe in categorizing people based on star alignments. I see personalities as random occurrences and I think if most people looked at other people on an individual basis, instead of a generalized one, they'd see that there is no real way that astrology works.
Then there's the fact that "new age" is attached to it. A whole other problem in and of itself.