For me it is very simple..and I have seen it with all people I respect for their choice how to live a "good life".
I have been asked often about how I define "talent".And my answer is always the same:Talent is the question of all questions:
How much do you love it;
How much are you ready to sacrifice (almost) everything to do it.How much work,sweat and most of all passion are you ready to bring into this;
No matter what we talk about..no matter if it is about making music or becomming a doctor or an astronaut..
It is always this question and the same answer..