I found the 1st thing I detest in the Office 2013 suite today; the fact that you can't hide the reading pane header in Outlook 2013. MS have removed this feature which was available in Outlook 2010 because apparently some users would hide it and then not be able to find how to re-enable it.
What a ridiculous reason to force all users to have nearly 30% of their screen real estate (if they prefer to have the reading pane at the bottom of the window, like me) taken up by superfluous information.
