What are some of the things that make you happy and give you a reason to live?

What drives some people to be so curious about watching surgeries, even to the point of seeking out videos online?
What are your preferences for staying healthy, as you define it?
Are there specific parts of a surgery that tend to make even medical professionals a bit nervous, like working near major arteries or nerves?
Does the realization that there is no grand plan or afterlife make your daily choices feel more significant?