Last I remember Oracle's VirtualBox was pretty good, definitely simple, but I think it may have had limitations. I forget. I'll try it again, but am going to go with QEMU for the moment and see how that goes.

Interesting, I've never heard of Zorin. I'm a big fan of the more traditional unix environments, and building things up from minimal base installs, which is what I like about Slackware (as far as Linux options go). My favorite overall is probably OpenBSD, getting into personal preferences and all, but it also has limitations, despite the great benefits it provides. I really like Solaris (well, Oracle Solaris), zones and ZFS are favorites. A dream machine would be OpenBSD-like in stability/security, yet with ZFS, but also the versatility of Linux. Anyway, I digress... getting back on topic....

I might install a Zorin VM, see what I think of it, although I'd like to get away from the MS Windows-style *nix. I like to avoid desktop environments and just stick with window managers, big fan of fluxbox. I'm going with a Microsoft-esque Linux this time around, but might strip the GUI stuff down to only essentials.

That is, I plan on running *nix primary with Windows (probably 10) as a VM, although I will also run additional VMs but only as test setups. I'll probably shut down the Windows VM to open those up. I'm running on a pretty typical CPU, not fancy, and with 8GB RAM. A small primary hard drive, only 80GB, but a 1TB secondary hard drive.

Interesting, I wonder if QEMU can do that.

What was the advantage to them not recognizing that they were virtual?

I've never heard of OpenVZ, thanks for bringing that one up! I might check it out.

With the the example you provided, what kind of hardware was running on the machine(s) hosting all of those VMs?

Thanks everybody for the input!