"Where do you get your ideas?" That's the one question I'm...

"Where do you get your ideas?" That's the one question I'm genuinely sick of being asked, and also genuinely fascinated by. What fascinates me is not that people ask the question, but what kind of answer are they really looking for? Because if I tell them the truth, which is "I make them up," they seem very disappointed. They want to know about the trek I do once a year to the mountain.