Well OS X is a BSD, so I use BSD for my desktop OS because that's what comes on my Mac... But seriously, the only successful desktop Unix or "Unix like" OS has

Well OS X is a BSD, so I use BSD for my desktop OS because that's what comes on my Mac... But seriously, the only successful desktop Unix or "Unix like" OS has been OS X, and it's really a joy to use. I don't have to fight it like I do Linux. If one of the BSDs would offer a better windowing system than X, I'd consider switching. For now, OS X is pretty much where it's at if you want Unix on the desktop.