Usually self-preservation. Often, the software projects I work on are things that simplify my life and it just so happens that other people want to use them too

Usually self-preservation. Often, the software projects I work on are things that simplify my life and it just so happens that other people want to use them too. I enjoy eating, having a home, feeding my children, and playing games. So, I do what I have to do to keep that going. Everything else requires effort for me to even start and once I'm going, even more effort to maintain.