Good to see you both again also.
I've used, and am using, OS X Leopard. It's wonderful.
I'm actually waiting for the arrival of my brand new MacBook Pro...I think waiting for Apple products is the longest wait *ever*. Even overnight shipping is not quick enough when all you want to do is crack open that sleek desktop replacement and hear the first gong!
As for Windows...I could almost sort of deal with Windows XP. And I did for a few years before I switched. But Vista is a whole new ball game and, to be honest, it drives me up a wall. I initially was helping my Vista-burdened friends with their systems, but have since resorted to OSX86 because it's just easier. Hah.
Ubuntu is nice, I guess. I tried using it back in October just to see if I was skilled enough for Linux and the jury is in: I'm so not. I mean, it's got a lot of great stuff installed standard and you can make it do anything. That's great. It's just that I have so little time lately to dedicate to the kind of learning curve that Linux presents. Perhaps someday when I can make it a true hobby...but right now I'm working on finishing up my degree(s) and I don't need the stress of a command line
Curious, Cyberion: what made you switch back from Mac? Was it pre- or post-OS X?