Folks, I think you've all given me a lot of good information. I'll mark this solved at the end of the day. I'll leave it open just in case anyone else wants to comment.

Thanks again to everyone....

At AsiaBSDCon 2017, Antoine Jacoutot and Baptiste Daroussin presented a "Comprehensive and biaised comparison of OpenBSD and FreeBSD." If you find the PDF a little too detailed, you can watch their presentation.

Great. Thank you. I'll read this.

I'm dual booting Slackware64-current and OpenBSD 6.7. The base install of OpenBSD does require a bit of configuring after the installation to get a working desktop. I like to use Vi to edit configuration files. OpenBSD 6.7 better identifies my hardware than FreeBSD. I was a long time FreeBSD user. Each to his/her own. I suggest that you try out both OpenBSD and FreeBSD and see which one works the best for you.
I'm running XFCE 4.14 on OpenBSD 6.7 and it runs well.

Thank you. Very helpful....

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You're welcome. I suggest that you try both in a VM and see which BSD you like. Both FreeBSD and OpenBSD are exceptional OSs.

Sounds great. Good suggestion. I will pick one Linux distro as my base and run others in a VM atop it. But since I'm at the stage now where I'm still picking that base distro, I could pick any one. ;-)

FBSD can be installed as VM client with full screen resolution support without any issues, however in the case of OBSD this requires extra work:
https://www.linuxquestions.org/quest...ml#post6049030

Otherwise you will end up with 800x600 resolution which is cumbersome and will prevent you from appreciating fully what OBSD can do.

OH, thank you. That is very useful information. For sure it would not be a meaningful evaluation of UI/UX if I run in 800x600 mode...! Thanks...
;-)

Thanks again for that referral to the post. There are quite a few awesome screen shots. That really helps me short list the distros I'd like to try....

I am not suggesting that you should not install OpenBSD in VM. It just needs extra step to get it working in full screen.

Sure. I understand. I didn't take it that way. ;-)

Between FreeBSD and OpenBSD, I'd recommend FreeBSD, but my reasoning is a bit different from most.

The FreeBSD Handbook is one of the best pieces of documentation you will encounter in the *nix world.

Installing FreeBSD following the FreeBSD Handbook is a marvelous learning experience.

Many thanks, Frank. It's valuable insight for me, seriously.

Hmm. In that situation, OpenBSD wins. While I'll agree that the FreeBSD Handbook really is a marvelous learning experience and an excellent example of top quality documentation, it is there because it is needed. You can't install FreeBSD without it. In contrast, OpenBSD is simple, logical, and organized enough that no full handbook is needed, just a FAQ, an architecture-specific README, and some really well-written manual pages with separate annotated example configuration files. They treat their documentation as seriously as the code. FreeBSD does too, but OpenBSD takes it that much further. The GNU/Linux distros could really benefit by following the example of either in those regards.