I have forgotten more about PCs than most people, having built my first in 1976 (an IMSAI 8080 with a then huge RAM complement of 768K--that's right, K, not M, and not G!) and the Hackintosh complexities make my head spin. I'm sure once you get into it, it gets easier, but it seems to me that if you only build One, and have a notion that it's going to run-and-run and you're not going to touch it till it breaks, then when it DOES break (and it will, or will need an update) then you have to re-learn what you did all over again.
Having said all of that, I am about to try to build one myself, more cuz I already have the hardware and Snow Leopard already. And I'm a hobbyist with dozens of computers here, including that IMSAI that I still have, and a few old PowerPC Macs...
But my advice would be, if you want a Mac, buy a Mac. If you want a hobby, build a Hackintosh.
Having said all of that, I am about to try to build one myself, more cuz I already have the hardware and Snow Leopard already. And I'm a hobbyist with dozens of computers here, including that IMSAI that I still have, and a few old PowerPC Macs...
But my advice would be, if you want a Mac, buy a Mac. If you want a hobby, build a Hackintosh.