Windows Media Player is broken
Now normally I wouldn't touch Windows Media Player with a barge pole, even when I do use Windows at work or for gaming I use VLC. This is mainly because Windows Media Player seems to be plagued by problems with codecs which I never have with VLC (and anyone who tells me to just download a massive codec pack clearly doesn't get the point) but also because it's a big clunky program made of fail. Today I found out (via a colleague, I wasn't using it myself) that Windows Media Player doesn't toggle between play and pause when you press the spacebar if it's fullscreened. This seems trivial until you think about it. Absolutely every other video or media player worth using recognises that the spacebar is the play/pause toggle button. Even YouTube recognises this. You can rely on it. Need to stop the movie because the popcorn is ready? No problem, hit the space bar. Even if this computer you are playing the video on is a Mac and you've never touched an Apple product in your life you can pretty much guarantee it'll work. Linux command line movie players such as MPlayer know this shortcut, VLC knows this shortcut. It's universal. Windows Media Player clearly just sucks. No real surprise there.