Well a lot of us beleive in horoscopes. We read it everyday, we check compatability with our partners and friends.
Let's discuss which role horoscope plays in Naruto manga.
We all know signs of main characters, lets see what could be their advantages and disadvatages.
For example, let me start with my own observation:
We all know that Naruto is a Libra. Sasuke is a Leo.
Relation between Leo and Libra can be described by words: "Master - Slave". And in manga we can see how far Naruto goes for Sasuke. It all looks like Slave is trying to serve his Master no matter what right?

Other observation:
Naruto is Libra. Libra is between Scorpio and Virgo. Scorpio represents desire, and Virgo represents intellect. Jiraya is Scorpio gave Naruto desire not to give up. Kakshi is Virgo gave Naruto intellect how to create incredible jutsus ( for example rasen-shuriken).
Let's see which horoscope sign is the most popular on forum - i am pretty sure that character from manga with the same sign will have the most discussions on him.
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Ok now Aries sign is the leader - so lets discuss Sakura who represents this sign.
Thats what horoscope says about Aries woman:
"The greatest weakness of the Aries women is her tendency to be aware only of her own needs, desires, and objectives. She assumes that what is correct for her is also right for everyone else."
Didn't Sakura decide to take Sasuke out alone without any help?
"The word “compromise” is not a popular phrase within Ms Aries’s vocabulary and this can give her a reputation for being pushy and insensitive."
How many times we have seen angry Sakura punching Naruto down? Eventhough Naruto was innocent sometimes
"Irrespective, the Aries woman’s fiery nature tends to warm and excite other people to the extent it inspires in them the dreams of hope and promise for the possibilities of future."
Remember what she asked Naruto about. And now inspired Naruto can't give up on his word and will save or kill Sasuke no matter what.