WOF: What's your favorite media player and why?

Winamp! <3

I keep the killer trio of KMplayer, Winamp Classic, and VLC on my desktop (BS player was recently retired, but I still recommend it)

KMplayer is the heavy weight champion of media players. It has virtually the same UI as winamp, it can play any file you throw at it, is endlessly customizable, and has a bevy of features of which I keep discovering new uses for everyday. It will recognize my usb sound card/mixer, has built in screen/vid capture, and even when I try to play a poor quality file, I can usually correct it to make it viewable in KM.

I started using Winamp about ten years ago and still keep it around because I am just so familiar with the User Interface. I also love using Winamp to convert FLAC files to MP3s and rip CDs

VLC has a garbage UI and is light on features/extras, but it will play everything and will often play large MKV files smoother when running on a weaker system. VLC gets a spot on the team for being light weight and playing anything.
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Every now and then a file will be formatted in such a way that one player(VLC and KM included) will not play and it is good to have options, but at least one player will always work.

Media player classic obviously ...Gom players ok aswell.

I use MPC HC for video, ffdshow when required. For music I use a PHP and Flash library/player combo I wrote for myself. Tried lots, VLC was the only other player I liked but has some quirky features/performance.

windows media player and AMP2 for music.

http://allplayer.com.br

CCCP with MPC-HC for videos and winamp for music , i do use WMP from time to time

k-lite codec pack and mpc, very good

WMP12, VLC

Winamp Mostly, But I will use VLC or Mediaplayer if its a file winamp cant play...

The main reason is the ease of its playlist system, just drag stuff in and let it go....

WMP for music and WMC for video so I can stream it to my 360. When I can find a HTPC case I like I'll be using XBMC.

SPlayer recently won me over, and for music, good old winamp lite

I'm still clinging to my MusicMatch Jukebox.

I hate Yahoo for killing it.

SPlayer for videos and foobar for music.

Love love love SPlayer's minimal UI and foobar is just deliciously customizable in every way. I have a few issues with the way playlists are handled but I don't tend to use them anyway.

MPC HC all the way
Winamp for music.

VLC. It's easy, simple and it plays everything.

Well, I rarely listen to music nowadays but back when I did I used core media player.

For video I use Media player classic and vlc. I use MPC for the really big mkv files(typically 1080p) but when it comes to anything 720p quality or lower I default to vlc. It's extremely lightweight and there's no need to post process and jazz up low quality videos.

The KM Player for Windows. VLC Media Player for Linux.

VLC, plays everything I have thrown at it, and I never had to go searching for a codec. Although to be honest, I have not tried anything else aside from WMP, which I hate with a passion.