Tough choice... It'd be certainly between macOS and BSD (though, they're kind of the same thing.) The hardware support for BSD might not be there, but for the hardware it does support, it's spectacularly fast, and spectacularly stable. I'd probably specifically buy hardware that is supported by BSD. I have several Apple machines, and macOS is nice for what it is, but I would have to have at lease ONE machine that is specifically NOT a Mac. I truly do not think that I could go back to a Windows machine as a daily driver. Apple will, at very least, fight for my privacy, even if it means chaining myself to their ecosystem (which has slowly happened, since Linux on HiDPI still kind of sucks, and my MBP is a retina model). Long story short, I'd probably build a BSD machine specifically to run BSD. I can live without gaming on PC if it means having to compromise privacy and security. Consoles do just fine.