Winamp for audio, WMP, BS & Cyberlink PowerDVD for video. Quicktime and Real Alternative when necessary *sigh*
I do kind of like
this guy's audio player for it's simplicity though! I'm tempted to try it, but I also sometimes require FLAC. His does however support mp3, ogg, wav, wma and midi, and is clean freeware.
Did anyone else use Xenorate? I liked it's performance and features as an "all in one" media player, but they seemed not to ever update it.