I believe there are myriad factors at play determining how we will express our personalities and unconscious drives. Each individual comes to Earth a template and there are soooo many reasons a child becomes the type of adult s/he does.
You've got culture, geographic location, astrological sign, birth order, DNA-genetic tendencies, socialization, race, neighborhood, education, love/affection/attention, religion, the list goes on. We really get to see how those factors really affect us when we look at research studies of twins or the adopted or even cohorts from a certain, specified group. Those of us who are separated from our biological families tend to still express mannerisms, gestures, demeanors, and attitudes of our biological family even without the input. The influences on our personalities are great.
IMO, and I am a Pisces, so I do believe there's some truth to be found in pretty much Everything, your Sun sign is a LARGE determinant in how you will express yourself to the world. It's almost like your Sign gives you your tools, the manner in which you will express your thoughts and intentions, and the other aforementioned factors may lend more to what's behind those actions, the intentions themselves. This is what makes Narcissism such an important thing to notice in our lives. If you are like me and believe that Nism is actually The Adversary's way of spreading evil and darkness around the world, veiled and insidious as it is, then you will see a larger picture emerge. We are all born with the capacity for wrong-doing, but some of us, (whether by way of abuse or neglect), choose to feed a deep hunger for the wrong-doing, and try to get away with it.
Your Sun sign probably lends to you just how you'd try to cover it up. Some signs like say the Water signs (Pisces, Cancer, Scorpio) will connect (or manipulate) on emotional, nonverbal levels. They are silent, mysterious types. Air signs (Gemini, Aquarius and Libra) desire contact and communication, therefore may try to enlist Nsupply by using sex or by bearing news/gossip, Fire signs (Aries, Sagittarius, and Leo) tend to be rather volatile, quick to anger, quick to forgive, and act on impulses. and Earth signs (Capricorn, Taurus, and Virgo) lean towards being material, practical and conservative but are generally highly attracted to dark, mysterious, people.
Have you casted your natal chart, Surrounded? Have you looked at your profile to see what you're really like? If you were in denial before you read it, you won't be once your finished. There was something about reading my own astrological profile that changed me. Never before, having any support or appreciation by my Nparents for who I really was as a child and young adult, I found my chart to re-affirming and steadying. Even the not-so-great qualities about myself, I embraced because there it was, it was me. Accepting yourself is relatively easy compared to accepting those in your life, you can't do anything about changing.
Astrology kind of arms you, though. It gives you a great idea as to how they (the malignant, evil-doing Ns) may come at you the next time they attack. And while most malignant Ns are opportunists fond of attacking the vulnerable who happen into their paths, you could be clued into just "how" they might work their schemes on you if you only knew their birthdate. I love having little "secret weapons" in my arsenal for my defense if needed. It really helps when dealing with my parents, two totally different types of malignant Ns. I know my Aries mom is going to just go on and on and on bragging or complaining inserting criticisms and innuendo throughout, whereas my Taurus dad is going to try to "kindly" insist I take a hand-me-down, washer/dryer combo set that may flood my basement or blow all the fuses in my home.

tiff