David Hutchinson has written an instructive overview on osnews.com about FreeBSD 9.1, its features and FreeBSD in general. He also explains why he prefers it over Linux.
FreeBSD is a complete and well-engineered system. While much of what they do involves less fanfare than Linux, they have a strong and active development and user community. They have kept pace with technology and still maintain a powerful system with modern features, and have done so mostly without anything feeling tacked on. The consistency of the system is why I prefer it over Linux – significant changes can rarely, if ever, be described as disruptive. But, changes still are made.
Very important from a technological standpoint as well as a philosophical standpoint is removal of GPL from the base system. There are some environments where the GPL is not appreciated or allowed (such as certain embedded scenarios), and these changes allow FreeBSD to fit into those environments. It is also important for the FreeBSD project, as it helps to strengthen the identity of the project and the license. [...]
There is still plenty of development going on the BSD world, and as I alluded to at the top, this is meant to be the first of several articles on BSD that I’ll be writing in the coming weeks, time allowing. [...]