Nice post.

Really good documentation is high on my list. While time consuming to create, in the long run its beneficial for the theme developer as they will have to answer fewer support questions.

I would like to see more themes come with a XML file for import containing the same content as their demo. That's pretty common in the Joomla world. In fact some of the Joomla theme clubs have installers that install the latest Joomla software, the theme package and the demo content in one easy install. This would partially address "What I Saw And What I Have Are Different"