I find skins to be very annoying, they like to put the open button in the upper right, the play is down in the middle, the stop doesn't look like a stop, it's in the shape of a frog or something. Then it's all orangey or yellow.Skins also take up desktop space, desktop space that could be used for other things ;p. The other idea behind a skin is to change it up every once in awhile. It doesn't do you much good to learn where shit is in one skin, then flip it around again and re-learn where it's at.
Most players out there just use DirectShow, none of them really improve apon it. DirectShow is a MS entity and it's up to M$ to officially update it. So the only thing a player could do would be to add some custom DS filters in and make them "easier" to add. I for one never use any filters that would require me to enable them per video. VobSub is pretty much it along with FFDShow... :\
I use MS Media Player 6.4 as well as DSCALER for watching TV on my computer. Anothing other then that has just a crappy skin over it that doesn't add any functionality.
Best Skin Ever
~klinky