… Welcome Songbird!
This free and Open Source player not only always looked nice but also works pretty stable now. I tried it from time to time in the past but there always were too many bugs (and only limited Last.fm-integration) for me.
That changed with the last updates and I decided to leave iTunes behind for this community-powered player (it works pretty well with last.fm and Mp3-players/iPods now). Lot’s of cool plugins/themes and stuff.
I also really like that they have a build-in global hotkey-function.
And it’s crossplatform (Win/Mac/Linux).
And since I become more and more a fan of Open Source software and I am more and more disgusted by Apples politics (shitty ads, all the iPhone-mess etc.) it’s only a logical step.