I've been on the job a few weeks now, and I must say, Debian isn't half bad. We use a bunch of canned procedures to setup new machines. PXE boot to an unattended install, with a local debian package mirror, and plenty of custom packages for our needs. Sadly, the system is so automated I rarely have to do anything beyond basic administration work -- adding new users, reseting passwords, that sort of thing. I've come to enjoy the machines though, they tend to be very stable, and pretty much run themselves. Debian++.