I don't like much of the DC GA artwork from any later than about '41. I like some of the early Batman, Spectre, Dr. Fate, and Sandman-original-costume covers, and that's about it. It's difficult to articulate a reason why because the artwork isn't necessarily bad—the bodily proportions seem correct, the perspective seems correct, etc., but it seems sterile and uninteresting. It seems too bright in terms of the color palette and the lack of shading and texturing. It's too neat and clean. It's boring.
I'm sure I could find plenty of exceptions if I looked (a few come to mind right away), but my overall impression of DC art from about '42—'69 is negative. I don't start to like DC artwork again until the Neal Adams and Bernie Wrightson covers of the early 70s—and then there isn't much of anything that I like after that.