Safari

I'm not a big fan of most bundled software in general, but there is nothing especially bad with it or anything, I just prefer Firefox for it's various features and extensions that I feel really let's me control my browsing experiance. (Firefox is also open source, and the administration and community is awesome).

The one real compliant I have about it is that it always tries to sneak it's way onto my old computer (back when I did not know any better and got iTunes) through Apple "updates". That just does not sit well with me.

Again, it's not terrible, I just don't see why people use it except that it comes with OS X (laziness).

There's probably not many who use Safari as their main Windows browser, but I'm one of them. My favourite feature is the Reader which picks out an article and displays it in an easy-to-read page format, minus the ads and other junk. On some sites it even spots multi-page documents (ie. those that you need to click through) and shows it in full. Great for printing as well.

There's a similar extension for Chrome, but it's not quite as smoothly done, so no incentive for me to change browsers.

I've only used Safari once, and that's just because I didn't notice it was included in the Apple Software Update. =P It was nothing special, in my opinion. It's not bad, but I don't see any reason to use it.

This is quick to open and smooth. I have choked my Firefox with all sorts of extensions and it is slow to open as a result, so Safari is used for the day-to-day browsing.

They copied chrome a bit in the last version, they're very similar.
I'm no fan of Apple, but this is a good browser.