I have a pseudo-clean install of OS X 10.4 on my iMac. (I didn't use a cleaner on my hard drive) I bought the pack with Tiger, iLife and iWork. I have never had an OS installation run so smooth; and I have installed many: Linux (many distros), FreeBSD (since 2.1), Windows 95, 98, NT, NT Server, 2000, 2000 Pro, XP, XP Pro, BeOS (well, this one was a pretty slick install), Solaris (only God knows how many times), AIX, HP-UX, and several other non-posix compliant Unix variants. Well, that's a 90% exhaustive list. So I really dig Apple's OS X. It's is the cleanest, easiest to use, and most enjoyable OS I have ever used.
But this OS is no toy. It has the most advanced search technology for the desktop available in Spotlight. This feature is unbelievably cool. And Dashboard... I just got the weather, the correct spelling of a word, stock prices, and glanced at my to do list. Now there are a lot of other features that are new to Tiger, and I do not know exactly what all of them can do... yet. If you are interested in learning more, then go to http://www.apple.com/macosx/ and read up.
I am almost at the point where I will shelve Windows for good. Even some of the free OS's out there are better (in my opinion) than any version of Windows. And they are free! I have already told my Forex broker I will close my account soon in favor of a non-Windows specific dealing platform. Their favorite comeback is "use Virtual PC". How'bout f*ck you. No more contributions to Bill Gates' Evil Empire. I can run a couple different dealing platforms now on my Mac and on my FreeBSD machine through the browser. When I make my final decision, I will phase out all Microsoft products in this house. I could do it now, but I would have to spend a chunk of money on a new printer, airport extreme base station, and possibly a new laptop for my mom. I cannot currently justify that expense. So until then, I will get by.
If you don't own a Mac, I suggest you give Apple a serious and objective look. After using a Mac you will be hooked.
-Have A Great Day!