I believe there is some truth here and there in the Zodiac, but it is more complex then simply reading your zodiac in a newspaper. Some cycles work on the Moon, others the Sun it depends on which Planets are rising or in some cases, which time you were born is also crucial.
To understand the Zodiac, one should read as many books as possible on it and then form their own opinions. I do find that I am say attracted to a particular star sign and they are so wrong for me. I have found that the people I most love in my life have been of the signs recommended in most books.
I do also see the similarities in personality of people sharing a zodiac sign and can usually guess someone's star sign before asking them. Thus I find the Zodiac helpful, maybe a warning at times to keep away from certain people esp marrying male Leo's.