I was dragged back to the Windows world with Vista and 7 because it was obviously more efficient with my time. Last year I purchased a mac mini and it has completely taken over as the machine that I get all of my work done on. Easily five times more efficiently than any other platform. My Windows machine does nothing more than store media and play games. The next computer I buy is going to be an rMBP, I have no doubt.

And before someone eventually brings up Ubuntu, it's a joke and a toy OS that's suitable for hobbyists and old people. I wouldn't suggest it to anyone who wants to actually learn Linux.

A fresh install of MacOS is probably 90% of the way ready for me to do everything I need. Getting it the other 10% there takes less than 2 hours. Tops. Windows (any flavor) starts at maybe 30%. Closing the gap is easily a full day. Getting a Linux system up and running properly takes a weekend, taking time to do everything the right way. It's worth it, no doubt, but requires much more effort to properly administer. My time is way too valuable for that.