Interesting subject. Since I learned of altruism at a very young age it is something I have thought about and noticed/not noticed a lot. Easy since my parents had some of this attitude.
I don't get what I want as much as some of my friends and family but I don't think that getting what I want is all there is anyway. I was raised as an only child living in a big world with many other people. Everyone has needs, not just me.