My family home schools. That means computers are necessary and everyone in the family has their own. I have been running a home network of seven computers for the last five years. It has been a nightmare job.
One day I noticed that my personal Mac was never causing me troubles. It was older and slow, but always doing its job. Once a hard drive crashed, but I had backups (which are easy to do) and after an evening of work was back in business.
Vista (outside of the marvelous media center application) has been horrid. Only an eight year old computer in the network (now too slow for most functions) did not constantly blue screen or cause other problems. XP by the end was marginally better, but looked like a Mac from a decade ago and was horrible at networking.