On one hand, I understand. Have to take care of yourself.
On the other hand, I do think being self-centered is bad. First, society (which - like it or not - you're here you're a part of) operates on unwritten understandings that we will give each other certain courtesies and help in certain situations. Being self-centered suggests you are willing to forego these to your own benefit - and hence other's detriment. Harm unto others is bad.
Second, and maybe more importantly for people who share your view: being self-centered and separating yourself from everyone and foregoing genuine human connections is a recipe for misery. (Waits for miserable people to try and correct him).
I don't know the answer for how to fill the god-shaped hole, but I know that filling it with the self never works.