If you use 2003 Server as a server, it is very stable. If you use 2003 Server as a workstation you could lose some stabiltiy. That's becuase some stuff that is turned off by default, means less that can possably go wrong. As a workstation it can be just as stable but by turning more stuff on you are increacing the odds that something could fail. I have seen no advantage to running 2003 Server as a workstation and many disadvantages.