I thought he found the perfect balance for his writing talents on Young Justice. A damned good series that he was derailed by DanDidiot's desire to restart Teen Titans for the 5,673,871st time.
YOUNG JUSTICE was a fun, charming comic with wonderfully cartoony artwork. It sold pretty well, too. But Dan DiDio ordered it replaced so Geoff Johns could launch, as I.J. says, yet another TITANS start-up, this one all grim 'n gritty. The first story arc, I recall, Deathstroke shot out Impulse's kneecap, forever making Impulse more bitter and somber. Yay, DC.
As for David's other stuff ... I liked his creator-owned FALLEN ANGEL for a while but eventually lost interest (around the time he started charging $4 per copy, ahead of the rest of the industry). I liked his SACHS AND VIOLENS with George Perez.
I've just started reading the first trade collection of his long, celebrated run on THE INCREDIBLE HULK. But the awful chicken-scratch art of Todd McFarlane is making it difficult for me to enjoy. I may be the one fanboy on Earth who doesn't like McFarlane's art.