What's the Best CMS?

Having just created a course in Joomla, I am curious about the other content management systems. This CMS was difficult to work with mostly because I had a lack of training. From the way it sounds, udutu would have been much easier to work with. Joomla also had several templates from which to choose and start. Changing things around did not so much require knowledge of programming languages, but rather an understanding of the infrastructure. There are so many interactive things I wanted to incorporate but did not know how and could not have learned on my own in a timely manner. So, this post is more or less to pose a few questions: Which content management systems you have used and which have been easy to work with? Which ones were best for interactivity?