As far as talent versus work, I'd have to vote more on the side of work. Why? A long time ago when I was just a wee lad, a friend of mine told me "Rob, practice makes perfect is actually from an old Germanic saying, and literally translated, it says repeated action makes the master." How does that figure here? Simple, if there is something that I absolutely love to do and feel a great deal of passion for, I'll keep doing it, and consequently get better at it. Best example that I can think of is martial arts.
But the really cool thing about people like Da Vinci is that their interests are many and varied, and their passion and zeal for them is just as great. So, consequently, they become masters of more than just one thing and they get to be called genius. Even better? The fact that no two of us human types are exactly alike, so the variety will never die down.
Does the human body interest me? Greatly....I've got only one and I'd like to make it last as long as possible. Is that morbid? Depends on your point of view...I grew up in a very rural area, and there were quite a few times that if we didn't kill it ourselves, we didn't eat. Some people consider the killing of animals "morbid", yet they think nothing of wolfing down a couple of burgers.
The human body as art? Sure! There's an exhibit running all over the U.S. that shows bodies looking like anatomy dummies but they're real. Don't forget people, Da Vinci turned out the greatest anatomy study that was unequaled until around the late 1980's.
Rob Murphy (firstname.lastname@example.org