Why use FreeBSD?

• The manpages. Unix-like systems use the man program for documentation. FreeBSD (and other BSDs) include the documentation as a part of the distribution, and include manpages for device drivers and kernel subsystems as well as the usual utilities and library APIs. For example, there is a manpage for the Atheros wifi driver, which lists products that are supported by the device driver.
• The ports collection. Virtually any third party software can be built and installed using the ports collection.
• rc.conf. Most configuration of the system is done with the /etc/rc.conf file. Everything from which services should be started to how the network should be configured is in one text file, with a very convenient template: /etc/defaults/rc.conf.