I've found that I'm much closer to my "found family" than I am to my own. I have two female friends that are closer to me than I am to my biological sister, and an older woman friend who I consider my "spiritual mother," and have for many years.
My biological mother influenced me in both positive and negative ways. On the one hand, so provided me with many opportunities to explore my talents and interests; I believe this enabled me to be flexible and to always be willing to try new things. On the other hand, she never nurtured empathy in me, so I think I'm somewhat cold toward others.