Is there a reason why i should prefer Markdown over restructuredText? rst sems to me has all i need, it has specs, it has decent documentation, it has tools, it's not only used to output HTML but all kinds of stuff.
rst just looks more powerful and yet still as readable as markdown.
Having used them both a fair bit (though not to write novels, like some of the people on here): Markdown source is prettier to look at. This might seem minor, but it's the primary goal of Markdown. If I'm writing something highly technical, I prefer RST; if I'm writing something closer to plain English, I prefer Markdown.
rst just looks more powerful and yet still as readable as markdown.