Well, yeah, post your music player.
This should be pretty interesting (different configs and skins), provided not everyone is using iTunes...

Why I use it: for one, I don't have an ipod [or any mp3 player for that matter], so syncing isn't a factor (though I believe you can have foobar sync if you have the proper plugins). Secondly, it's just really, really, really fucking configurable, and the only plugin I have downloaded is to make it have columns that can be sorted...and I think album art was a separate plugin, not sure.
Also, you can customize all the keyboard shortcuts you want, so I have a global shortcut for play/pause. Helpful for controlling the player without having to stop what you're doing.
The only drawback (IMO) is the lack of smart playlists...and there might even be a plugin for that somewhere. I just haven't looked for one yet.
Comments
As long as it can play my Hendrix and my Geeknights, I'm set.
XMplay because it's simple and uses like 2mb of RAM, I don't care about skins (though I think it's skinnable) and I don't like to fuss much with playlists and whatnot.
Zune Software for Windows (It sucks, but makes updating a lot easier)