In the many books about Queen Victoria's family that I have read, Leopold seems to be known only for his haemophilia. He seems to have been the most popular member within the royal family, although not with his mother, who seemed to see him as a convenient drone. She was notorious for trying to keep her children on a leash long into adulthood. Leopold appears to have overcome these obstacles. In his short life, he accomplished a great deal, he was the first of the royal family to attend Oxford, he was on the boards of a great many charities, he managed to travel, and he worked as an unofficial secretary to his mother.
This is a well written and researched book. The author provides information on other more obscure members of Queen Victoria's family, such as her half sister Feodora and her family. The family tree of the female side of Victoria's family is the most extensive and interesting I have seen, although it does not solve the question of where the haemophilia in the family came from.