I do. The main reason is that I know it better and I feel it is easier to know it well thanks to good documentation and relative simplicity (compare to Linux). First class ZFS support is another reason. While ZFS is available on Linux in distros I would use (OpenSuse or Fedora) it is not available by default and needs to be installed separately. Also use i3 WM and install only apps I use - a typical Linux distro which brings Gnome/KDE/Unity and lots of apps I don't need is a waste of space (on my small SSD).

Though I admit that FreeBSD desktop is less user and especially novice user friendly than Linux. Another big reason to prefer Linux is closed source software. Sometimes closed source apps have Linux versions but practically never FreeBSD ones. Linux emulation works for simple apps but setting up something like Skype or Zoom (which requires camera/mic access) is too much of a work even for an experienced FreeBSD user (if possible at all).