Well, I'd just like to point out that Mac OS X, can be both for the low end users, and high end users. This is thanks to the unix base. For the high end user, you can do whatever you need to through a terminal. The low end user never needs to know that even exists. That to me, right there, is good UI design. The only thing that a Mac OS X user misses out on, in my opinion, is UI customization, such as what you get with a patched uxtheme.dll or GNOME/KDE/XFCE/e17/e16/Blackbox/Fluxbox/etc.
I've said this an exhausting amount of times by now, but my main computer is an Asus EeePC 1005HA-B, running Microsoft Windows XP Home SP3. Not my optimal choice of OS, but for what I need, it does the job BEAUTIFULLY. Linux, unfortunately, has a few issues which bug me on this machine, and for OS X, I'd need to replace the wifi card =(
I can honestly say, that I don't think Windows should be the main OS for most people, as it currently is. So many things can go wrong at any given moment. As I have things set up with family and friends, they're all using OS X or Linux, and not a single one of them has an issue...usually. The ones with Linux, I lend my horribly out of date O'reilly Linux Pocket Guide, which still has a lot of useful information. This is usually for the people who are closer to my age and have an easier time grasping some of the concepts behind Linux, and can retain the information on how to use it. The others on OS X... well, things just seem to work for them and I need to do very few things. Except in the case of my father, he can't remember jack sh*t, he can't even remember "+Set UI_Console 1 +Set cheats 1 +set thereisnomonkey 1" for Medal Of Honor: Allied Assault when he just wants to kill Nazis and not worry about dying.
To each their own, I guess
EDIT: Also, quick note on Vista, regarding this netbook. Windows XP, can recognize my monitor by default and set the resolution to 1024x600, like it should be. So can Windows 7... Windows Vista, however... Vista sees 2 possible resolutions, 640x480, and 1024x768; neither of which looks good on this screen.
EDIT2: Damnit, I just keep coming up with more to add to this post. Once again on the subject of Macs. I got my first mac back when OS 9 JUST came out. We dropped Windows like a sack of shit, and switched over 100%, and back then, I loved it. Nowadays, I can't stand a Mac OS that isn't OS X. Now, back then, I may have liked it because of the games (I really dig classic gaming, and there was a good deal of old-school games on OS X, and RockNES existed, so that was even better), but nowadays, I can't stand it for one, simple, little, feature. It doesn't have a command line. If it wasn't for that little, I guess you could say, oversight, I may actually consider it a decent operating system, but it doesn't; and I think a lot of the anti-mac crowd is... Well, I wouldn't say traumatized, but definitely influenced, by some of those major flaws in pre OS X Mac Operating Systems. Due to the shittiness of those OS's, they refuse to look at OS X for what it really is, a complete rewrite, which actually works VERY well. I also think that's a large part of why Macs are gaining market share. Most average computer users of today, don't remember those Operating Systems, and therefore, don't see that stigma. Therefore they look at OS X in a much less biased way than all of us do. I'll admit it, just due to my having an OS 9 machine when I was younger (MUCH younger), I have that small bias within me. Now, I love Macs to death, but OS 9 still has an impact on how I think of computers.
Alright, I think that'll be the last edit for a while