No virtual desktops would probably be my #1 reason to switch back to FreeBSD running e17. Now I have to pester IT into giving me the Leopard installation media. Been a very frustrating day with a single cluttered desktop.
Some of the other pain points with OS X:
I have also been trying to install all my usual apps like cdrdao, logjam, opera, adium, deluge etc. I think fink is dead, macports seems to be the more popular way of getting to ports. IAC, I have both installed.