I never understand the problem people have with iTunes. It runs well on the Mac and does an easy job of transferring music/movies to the iPod or iPhone.
My main problem is, I really would like to use something else, but nothing comes close to iTunes.
WinAmp on Windows is OK for the odd track, but in terms of managing a music library, everything else sucks badly..
iTunes is simply awesome, on both Mac and Windows. Everything is right about it..
The *only* thing I would change is having it watch folders (without a dirty third party app), but apart from that, it's perfect.