From the question, you're likely a PC person so you know what to love/hate there
I got a Mac for the wife back in the early '80s and we've updated three times since then.
The latest Mac OS X retains the Mac, look-n-feel while having
moved the OS itself to a Unix FreeBSD foundation. Read carefully there and you
see that you can now get to a terminal window and run Unix commands and X11
GUI as well.
Sadly, Mac is a niche market well supported in desktop publishing and printing.
It is capable of much more and is quite simple to configure, maintain and to learn.
Unless you have a specific reason to migrate from a PC to the Mac,
I always recommend you stay with what you know best -- especially if there
are critical applications you need and a timeline to complete a task.
Frankly, I love working on it, and I am knowledgeable on PCs, Unix's, and Mainframes.