The thing I like about markdown is that it's very readable as just a raw format. With the bonus that it's easily converted to HTML. But it doesn't need to be converted to HTML.
I guess this sort of falls under the "But I hate the syntax" section of the article, but I don't think it quite gets the point. I can look at a Markdown file and read or write it without even really thinking. Which is not really the case with rST (or even HTML, for that matter).
I can look at a rST file and read it, and I think you will have no problem reading every rST file I've ever looked at. Sure it will take you a few seconds to realize you can ignore various syntax things, but that isn't a big deal and then the whole makes sense. Of course rST gives a lot more options to write documents that are not human readable, but it isn't that hard to make them readable.
I guess this sort of falls under the "But I hate the syntax" section of the article, but I don't think it quite gets the point. I can look at a Markdown file and read or write it without even really thinking. Which is not really the case with rST (or even HTML, for that matter).