To be honest, I don't usually get inspired to make original work by other pieces of art that are good!
Not directly, anyway. But if something is like.... CLOSE to being good, or falls frustratingly short of being what I wanted, or was fun but didn't explore the part of the story that's interesting to me, that's what makes me want to start creating myself. A well-told story won't usually inspire me, but a great idea that no one is telling well is incredibly motivating. I want to figure out why it didn't work, and how to make it work!!
I also find people inspiring, in general. The ways that people interact with, learn from, misuse, grow with, manipulate, or connect with each other, and the ways that people fail to understand themselves, are extremely interesting to me; it's something that feels worth trying to understand and capture.