Well, Quicktime Player on a PC runs like a dream compared to Windows Media Player on a mac...
God, that's the truth. WMP is an abomination on the Mac. I had to search out codecs so I could play WMV and AVI files through QuickTime and ditch WMP entirely on my Mac.
not some over-GUI'd player no-one wants to use.
What's over-GUI'd about it? You double click the movie, the player comes up, you click the "Play" button which is big, round, and in the middle of the control panel at the bottom.
If you set movies to autoplay, all you need is the initial double click.