iTunes
iTunes for Windows is a completely different kettle of fish.
I primarily use both platforms, and have to say it "feels" a lot different on Windows (Vista & XP). Not sure I'd go as far as saying it's bloated, but it's definately slower on the PC.
If you're finding it a lot slower, you could try turning off the automatic searching for Apple TVs, and shared libraries, turn off the ministore and check that you aren't using duplicate files by telling iTunes to leave your music folder alone.
The Winamp argument just makes me
to be honest. It's a totally different application. Ok, so it can do a lot (if not more) of the same features of iTunes, but it's not cross-platform which just makes the logic flawed. Admittedly, it probably is "less bloated" than iTunes, but that's because it looks like poop.
iTunes on OS X feels very snappy, on Windows, it doesn't.
No Virii on OS X
There will always be the people who will tout the "proof of concept" virii that have defeated the statement, but the fact is, there are no virii in the wild that can infect the OS without admin permission. You would have to type in the password, click confirm and be a complete twonk to get infected on OS X.
Ok, so the marketshare of the Mac isn't prompting people to write these virii, but I couldn't think of a more desirable virii to write than one that could take out say, an iPhone, or just for the "shut up" factor and kudos... yet it's not been done.
Intutitive Operating System
If you give the OS a chance you'll find things are more logically thought out.
Prime example, the OS X Vs. Windows Vista Control panel.. need I say more?
Price
Yes, you can get cheaper notebooks (The Mrs' uses Acer 5920, 15.4", 160GB HDD, 2GB RAM, Vista Home Premium; basically a simular spec to a MacBook Pro but a third of the cost) but they look like poop.
You do also pay for build quality, and a certain amount of "brand" value, but you'd do the same for a car (BMW). It could be argued that Apple charges a simularly steep price for their desktop line but just try speccing the same server hardware on Dell. It's not so bad, if not cheaper.