Oh how I love this thread.
I'm going to have to show it to a few Steve Job fanyboys I know
However, if good quality hardware is used a PC should be very reliable.
I think a lot of people blame the PC when their problems have been down to software.
I know a few Mac users who have had their fair share of software crashing but then this will happen on both platforms with buggy software.
Another thing is that a lot of people complain that Macs are a lot more expensive than PC's.
Now, I don't know anything about Mac hardware but one of the problems with cheap PCs is cheap components.
I've worked in the electroninc and IT industries for a very long time.
Everyone has a preference towards their choice of general consumer electronic manufacturers and this can probably be counted as a handful of companies.
Components do make a difference and yes, obviously there will be failures with better quality components, it's nothing like the failure rate with cheaper components.
Most big PC manufacuterers tend to use cheap motherboards but their are smaller companies out there who build custom PCs using higher quality products.
Quite often the people who build these custom PCs are quite technical and can tweak a PC to gain performance whereas Mr Big is producing on a mass production line via conveyor belts.
It's the same old story, you get what you pay for.