One of the paradoxes of my personality, which I think is actually a strength, is that I'm selfish and giving.
I'm selfish in that I'm quite aware of my self-interest, and frequently take actions to better my self-interest.
I'm giving in that I genuinely want to help people, and are quite happy to share my good fortune with the people in my life.
This combination may seem paradoxical, but I would argue is stronger than either trait alone.
The purely selfish are experts at losing friends and alienating people. The purely giving are often pushovers who destroy their own lives.
By balancing selfishness and generosity, I seek ways to create massive value, but am then willing to share it with the deserving.