Learning Curve for Popular CMS
I really like the Learning curve for popular CMS proposed by Artur Cistov in 2011. For most people it seems quite complicated after the initial installation and messing about. However, thanks to tools like Drupal Gardens, it may just yet reach the everyday user. To date, it's easier to use wordpress and the like for blogging. But I like to think that I may be one of the dead bodies being pushed along (and possibly falling over the edge). The problem is everything moves SO quickly! Already there are Drupal 8 sprints happening and there are yet to be many Drupal users yet to enter the world of Drupal 6 let alone Drupal 7! And yet, Drupal as a whole needs to compete with developments in technology - such that - becoming easily mobile being one.
All in all, I like that you don't have to re-invent the wheel. I like that with each iteration, it seems to get better and more useful and easy to use.