There may be a difference here between non-fiction and fiction. I think I'm pickier about the layout, font, etc of a non-fiction book than a novel. As long as the print is easy to read, I'm usually good to go on a novel--although I do prefer some covers of classic literature to others. (Don't get me started on movie-themed book covers). But a "self-help", informative how-to, or some other informational book really needs to wow me a bit beyond just the printed content. Am I alone? Do you judge books by their overall appearance? What's necessary for you to actually purchase a book.
What about blogs? As I've been spending time lately with the layout and image of my blog, I began to wonder. How much does the look of a blog matter? I know I'm much more apt to read blogs that are visually appealing, but then after that initial draw, I spend more than half of my blog reading time on Google Reader, so I don't see the actual blog very often.
Do you read most blogs by RSS or via the actual site? Are some sites so lovely that you make it a point to visit them directly?
What woos you more? Text or visuals? Is is different for online reading and print materials?