I built one in 2009 and I used it for about 4 years. My primary reason was: I wanted an OS with an "unix-like environment", but I also wanted to be able to run

I built one in 2009 and I used it for about 4 years. My primary reason was: I wanted an OS with an "unix-like environment", but I also wanted to be able to run the Adobe Creative Suite natively (and fully color managed). Last but not least I needed a powerful machine with a dedicated GPU. The alternative to a hack was a pimped out Mac Pro for about thrice the price. I figured it wasn't worth it, and I was right. At work I was running a Mac Pro, at home I was running the hack. I had zero problems with the hack, but every point upgrade naturally meant a moment of prayer. I always did a full mirror of the system disk with dd before upgrading, but never had a problem.