Mac OS X as a casual experience isn't bad at all. On the other hand, as a computer professional, I'm frustrated by how embedded and arcane access to real system statistics and options are -- I wound up finding the Terminal and hacking around from the FreeBSD prompt (ah, the Unix-esque life, it's good to be back.) It's certainly not an OS for those who've made computers their business and lifestyle, although it isn't unusable. It's like night and day over my LAST Mac experience, which was under the well-nigh unusable OS 9 -- how Macfags EVER hyped that Win3.1 grade piece of shit is beyond me. True multitasking when they FINALLY got it in 2002 musta blown their little idiot minds.
My wife, on the other hand, likes that all the shit *she* cares about is RIGHT THERE -- the browser, the weather report, iTunes, the DVD playback, the aquarium screensaver -- without the need to dredge around a bit in various menus.