Why exactly do you single my post out instead of the one line zingers against Microsoft or the Zune?
As far as software goes, iTunes gets the job done. I have a shuffle, and adding music to it is a breeze and it is great at keeping the software up to date and everything. The problem is, the look of iTunes is just so plain and uninspired to me that when I put some music up on my computer to play at lets say a party or something, it is just a list of songs. Zune on the other hand, has great album art presentations when you leave it alone, kind of like a screen saver. If you're navigating it, you can do it in a few different ways. You can do it in a list mode similar to iTunes, but with better cover art presentations and better looking format, text, etc. You can also navigate in a different way from which is a really cool kind of virtual way. This is all hard to explain in text, but you can probably get a feel with videos or screen shots if you find some.
Lastly as some have pointed out, iTunes doesn't run very well on PC. My PC can handle it so it doesn't really lag it, but my old laptop had a lot of trouble with iTunes. Looking at it right now, Zune is using about 7% less CPU and I have it in the virtual play mode. iTunes runs without issue on OS-X usually, but there isn't any comparison on CPU usage obviously.
My post count is so low because this is the first topic I've posted in. I frequent Macrumors, but until now didn't really have anything to add in the comments and usually there isn't any reason for me to read them. I assumed the Zune would get some harsh treatment, this is a spot for Apple product news, so I wanted to add my 2 cents as someone who at least has a lot of experience with iTunes and Zune software, and with the first gen Zune.