personally most Stable OSs i use are Windows XP Professional & AmigaOS 4.0
... i've never found another OS which is even half as reliable or stable as XP Professional, don't even get my started on how much i hate XP Home ... god what a waste of time that is.
and britt that is exactly why i tend not to use Linux OS's - they might not crash as much as a Windows based system, but at the end of the day atleast you know if Windows does crash - reboot and everything generally is hunky dory again.
when a Linux system crashes its like a suicide bomber, it wants to take everything with it...
MacOS after a crash generally refuses to bootup until you apologise to it.
BeOS is alright, but quite unstable when using Windows things like DirectX.
Unix systems are pretty stable, pitty they can't really run much software at all ... generally it has to be compiled specifically for that Unix version else - forget about it working.
however on the note of Linux basics - PureBASIC supports linux, but i use that term "support" loosely.
runs perfectly on AmigaOS 3.x though