I really appreciate wordpress for several reasons: Basically I have worked in different projects with the tool, both website and blog focused. In my opinion wordpress is one of the very best examples how open source software can be developed and provided to users.
Recently I am also faced with the commercial services of wordpress.com, and hey, it is a great peace of service too! The recently updated version 3.8.1 is handy, both available as download and also integrated in the service. So thumbs up for wordpress.org and wordpress.com 🙂