1. ZFS cross platform worked beautifully. I have a multi-disk "ZFS on Linux - created" pool. I had no problems importing the pool with FreeBSD. And, as I switched back after running the pool under FreeBSD for a few days, I encountered no issues re-importing the pool under ZFS on Linux.
2. I have many KVM/qemu VMs. I'd love to run bhyve, but many VMs are Windows. It's not too hard to convert the images to boot up under VirtualBox. VirtualBox under FreeBSD works very well. For managing multiple VMs across several servers, I prefer virt-manager
3. While copying large vm images, I realized BSD's cp command doesn't support sparse files. One is left to use rsync. There is the linux/compat cp command which does support sparse, however this cp command crashed on me while copying large files.
4. Minecraft -- It worked great under FreeBSD -- just be sure to follow the directions to point to the correct Java runtime in your Minecraft profile.
5. I installed serveral other programs I use frequently (some binary installs from pkg and some source compiles): Chromium, Thunderbird, Blender, KDE, Gimp, Kdenlive, LibreOffice, OpenJDK , NVidia driver using a 3-headed display, VLC, MPV, HandBrake, FFMpeg, and others. All these worked fine. For the most part, my FreeBSD desktop was indistinguishable from my Linux desktop.
6. I set up several NFS4 exported mount points. No issues mounting these from multiple Linux hosts.
7. Webcam tested no issues. I had to install webcamd and follow the instructions.
8. Audio tested and worked well out of the box.
9. VNC server and clients worked fine.
Overall, I'm -- once again -- very impressed. Setup was fast ( even ports package compiles were very fast ). I'm familiar with FreeBSD, so that helps with the install time. Newcomers should always expect to put in extra time (As mentioned, PCBSD can help get you into a graphical environment quickly, so less of a learning curve). What would I miss if I switched over 100%??? I would miss KVM/virt-manager, native cp support of sparse files, native mkvmerge, and I'd love to get a native Eclipse IDE Luna port., and an intel 7260 Wifi driver. To be fair, I still need to give it more time. I might try again this weekend and coming week, since I'll have some free time. If you enjoy tinkering and learning the details of configuring your OS, FreeBSD is great. For a quick, get-it-up-and-working, PCBSD works very well.