I have finished migrating back to Wordpress now.

Why? Because I am not actively doing any Drupal work at present, so it seemed a big overhead maintaining Drupal blogs along with my families Wordpress blogs. The anti-spam technology was different for both, and both needed upgrading regularly, plus there are always advisories to patch. Now I only have to worry about one set of technology. Also, I wasn’t doing anything particularly special in my blogs that Wordpress couldn’t do anyway.

But, why not move the other blogs to Drupal? Because, all said and done, Drupal is much less end-user friendly and the people writing in those blogs have more to worry about than playing with fancy CMS tools.