Remember the sand art you made as a child when you would pour different colors of sand into a glass jar, creating swirls and layers--your very own rainbow? (Until you poured it all out to try again, but the sand just mixed into sort of a grayish color.)(Very much beside the point.)
As writers, I think we'd all agree that we have three colors filling our glass jars, although the amount and pattern differ between each of us: natural talent (sort of a greenish, earthy tone), love of writing (definitely purple and NOT pink), and drive (fiery, sunrise red).
I don't think that it's possible for a writer to have only one. You just can't have one without the other. Even if your jar is filled with earthy, enviable green, you need a mix of love and drive to bring your talent to life.
I feel like my jar is about three-fifths purple, one-fifth green, one-fifth red, and one-fifth chocolate-chip cookie dough (totally necessary for writing). (Wait a second, how many fifths make one whole?) What about yours?