One of the books I'm currently reading, Big Magic: Creative Living Beyond Fear offers an intriguing idea about the nature of creative genius. The author shares that the ideas a person gets and acts on are the result of the genius, but the genius is a spirit working through you.
Kind of like A Genius Locii (a spirit of place), but instead its a spirit of creativity.
I think its an intriguing way to look at one's own sense of genius, because instead of claiming something as you're own, you acknowledge its a gift that's been given to you, an offering that you've been allowed to express (should you take it up). It's an opportunity to be humble and recognize how your creativity is inspired.