People in general prefer to watch movies in full screen mode, not in windowed one. Most of the time you won’t see the graphical interface when watching a movie, so there is little reason to use a video player based on how cool it looks. Therefore, using Media Player Classic would be more than enough for most people. Its user interface is all about simplicity. All video and audio formats that most people commonly play are supported such as MP4 and MKV. And there are quite a lot of options that makes it a highly customizable video player.
