God, our genes, our environment, or some stupid programmer keying in code at an ancient terminal - there's no way free will can ever exist if we as individuals are the result of some external cause.
I'm involved in Project ALS which is trying to get money for stem cell research. That's one I've been pretty involved with because if you can cure that, you can cure so many other diseases.
I used to get so jealous if my wife liked another band more than my own. Come to think of it, I still do.