The first thing I want to do after this type of questions is to transform into a turtle and hide in my shell. I don’t want to answer. Any of my answers was told by somebody else at one moment or another. There’s nothing I could add to the story.
I just want to do things. I don’t want to explain myself to people who should trust me and I don’t need to explain anything to people that just ask with no real good purpose.
What’s in it for me? What should be for anybody: to live a good life (according to our society norms – money, recognition, etc), to balance my needs and what I can do to help others. It’s a boring answer. Nothing special.
It’s how the books (like Roadside Picnic) I read when I was little educated me:
What’s in it for you?