Vash: Heck, I'm a Mac user and I absolutely hate getting Macs to work on mostly-Windows networks. If you've got an all-Mac network, it works like a charm; if you want both Macs and Windows-based PCs to coexist happily, you've got to go through hell and do a bunch of stupid hacky stuff to get it to work right.

I'll never forget how much of a headache it was setting up my test domain with Macs and PCs (all powered by Mac OS X server - I think it was 10.7 at the time) during my internship with the Department of Energy. That was one of the most frustrating experiences I've ever had in tech. Don't even get me started on the subject of getting the Windows machines to back up automatically to the Time Capsule.

(All that said, Windows and OS X are both awesome in their own ways; they only really suck when you have to make them talk to each other.)