Simply put, he combined words into meaning no one else has ever created. Plus, his compositions flowed effortlessly, with nothing ham-handed or laborious.
His lyrical constructions create a sense of joy to those who care about such.
In the first of a series of posts about Carter's song lyrics, below is a snippet from "Frank To Valentino" on the "When I Go" release.
"...he got himself married at seventeenFocusing specifically the fifth line:
she looked real pretty but she talked kinda mean
he thought they'd work things out in the fullness of time
twenty years later he's headed south
the close-range victim of her sawed-off mouth
leavin' their salad days behind..."
the close-range victim of her sawed-off mouthIt's just nine words but used in a manner typically involving the usage of a shotgun on an individual and not verbalization in a relationship.
Just think of the degree of consciousness that brought forth this combination -- that's the genius of Dave Carter.