The one time I tried to make a Hackintosh, it ran wonderfully for weeks (after spending tens of hours getting it going in the first place). Then an OS X update came out, I installed it, and it never recovered. Nowadays, I don't have the time or desire to have to screw with it every time a major update drops and it messes up (or even has the potential to).
One of the greatest things about Apple's combination of software and hardware, IMO, is that It Just Works(TM). A Hackintosh doesn't.