It would never do to return from FOSDEM with the same OS on my laptop as when I left; so now I have been running PC-BSD instead of OpenSolaris for a week.
I can be brief about what bothers me most about PC-BSD: there is an error in the Fibonacci sequence in the default wallpaper. It's hardly visible, but glaring at the same time. Maybe this is a consequence of me reading number theory before going to bed every night.
For the rest I'm bouncing back and forth between "that's really cool" and "it's FreeBSD, of course it works." I won't comment on the package management system (PBI, alongside the usual FreeBSD ports) or installation (graphical, instead of the FreeBSD text-based one). Instead, it's the KDE4 that is delivered with PC-BSD.