The Legend of Burning Boy
When a young Lakota warrior wakes to find his tribe massacred by Cavalry, he manifests the ability to control fire. He sets off on a journey to hunt down the killers with his supernatural powers.
While the concept for this story has evolved over the years, my motivation remains the same - I would love to see a Western told from the perspective of Native Americans and the many minorities who were an integral part of American History. Originally the protagonist was female.