I'm with you conceptually, but I don't end up using Flipboard much if at all—and I understand I'm generalizing from a minute sample, so bear with me—because I don't find it to be the best way to read anything. For news/text, Instapaper is king, and for Facebook and Twitter, I find that the Facebook app and Tweetbot win out.
Is there a type of content that you find Flipboard excels at presenting, particularly on mobile? Or that "the Pinterest layout" does, besides Pinterest?