FreeBSD is my preferred OS thanks to ZFS, disk encryption, the wholly-owned base system, ports/packages, jails for securing network services, and the community.
A few years ago, I found myself looking for a new OS for day-to-day use. I'd been using Mac OS X for several years because my employer provided a MacBook Pro and I really loved the nice, clean Aqua UI on top of a POSIX compliant core. However, I was setting up a desktop, didn't want to spend a fortune on Apple hardware, and wasn't sure I liked the direction Apple was heading with OS X by making it more like iOS. My requirements pretty much boiled down to security (including support for full-disk encryption), stability, flexibility, software freedom, and a thriving community for those inevitable times when I would need some wisdom. If you're reading this blog, I probably don't need to tell you why Windows was ruled out before the competition started.
I had years of experience with Linux, but it had been long enough since I used it for a desktop OS that I was able to justify taking a fresh look at the leading distros. I compared the "market leaders" at the time including Red Hat, Ubuntu/Kubuntu, Mint, Debian, and others. I had almost settled on the old classic, Debian, when I saw that it now supported 2 kernels: Linux and kFreeBSD. Since OS X also had BSD roots, I decided to research it a little. Why was Debian bothering to support another kernel? Why had NeXT chosen to use BSD code for what later became OS X? In my research, I found that many other companies had chosen to use BSD code or BSD in whole either for their servers or as a base for their products including The Apache Software Foundation, Netflix, Juniper, NetApp, Sony (for the PS3 and PS4), and Experts Exchange. Among the BSD information I read was Matt Fuller's BSD for Linux Users, which is a great read that caught my attention right off the bat with this common BSD adage: