-A lot of supported file types/codecs/etc... DRM (protected) WMA files have been the problem so far. And with WMP I am constantly running into things it doesn't support
-very low strain on system... its old and slow already.
-integration... i use FireFox, so ability to integrate with browser is a big plus
-sound quality... obviously
-skins and other extensions would be cool, but not a huge deal.
-oh, and its gotta be free.
Let me rule out some of the biggies: WMP (high strain, file types), WinAmp (don't know, i just don't like it), and Itunes (never!). I've also tried VLC and XMPlay recently. VLC has some major issues and XMplay doesn't play protected WMA's (but otherwise its not too bad).
I've noticed that media players that do both audio and video seem to compromise some things from each category, so I'm more than happy with one audio player and a separate video player. I'd actually like as many suggestions as I can get. Thanks in advance for any ideas!