Im a fan of the old Mplayer CE because I think it gives a better picture and specialy color. Also it seems to handle compressed video better then wiimc.
I know most of you use Wiimc, but I was hoping someone used Mplayer and could help me.

I get frequent errors using SMB where I might be able to play 2 avi episodes and then the wii wil lock and shows "loading vobsub" in the corner. I then have to manualy hold the button on the wii to shut it down.
Also sometimes when I try to start Mplayer it cannot seem to find my USB HDD, and I need to disconect the power cable to get it to work!