I'm using Daum Pot Player at the moment, before that vlc media player.

VLC for general use
MPC-HC for TS files

Very occasionally I'll use WMP for large TS files since it looks better for some reason

the KMPlayer is the best
especially this version 3.6.0.87

Watch mainly through XBMC via my NAS.

BS Player

If I was using my PC Definitely VLC all the way, at the moment I am using PLEX this is running from my Dedicated Server.

VLC always does the trick

I looove using Plex. It tracks my progress through all the shows, works great with a remote, and you can even set it up as a separate media server. Super great on a TV.

the KMplayer is a good one

i use media player classic,also VLC player