It's not so much the crashing out of the game when the Windows key is pressed accidentally, it's the dying inside the game because you suddenly cannot see anymore what's happening

I used to pry the Windows key out of my keyboards so that I could not accidentally press it anymore, newer gamer keyboards have a dedicated "Windows key off" switch. Which tells you a lot about how much gamers complained when keyboard companies decide to put in a new button specifically to DISABLE a key Microsoft forced them to put onto they keyboards just to get the "designed for Windows" label.
Though, to be honest, for the last two years or so I use a separate small programmable keyboard for games (where I can program exactly which key does what), so I use the main keyboard only for chatting and the "Windows key problem" went away because of that.
Back on topic though, i.e. about Windows 8:
I can live with it - I do not really like it, because I dislike the general UI look (the desktop looks looks like "my first GUI" with its flat, no transparency look) and because many of the changes make, in my opinion, no sense for a desktop computer - what use is a touch UI if you're sitting in front of a triple screen 27" setup and cannot even reach the screen from where you sit? Also, some changes make things more annoying for me at work (I work in the server department at a larger company). Server 2012R2 (the 8.1 equivalent) made some things finally easier, so I can live with that version, but before that (the 8.0 equivalent), using the management tools simply took many more mouse clicks than in server 2008 r2, because all the NEW versions of the tools have the same Windows 8 "less information using more screen estate" design, and you had to dig around to find the old, more informative and easier to use versions which are still there, too. Also, the new tools are kind of annoying to use when you remote console to a server with a 1024x768 screen, but the GUI obviously is designed for a higher screen resolution and you have to scroll around all the time. Well, the good thing is that it finally made me accept powershell for administration.
Back to the home desktop: I am still using Windows 7 here. I got upgrade licenses for my Windows 7 machines when MS had the promotion, so I can upgrade to Windows 8 and then Windows 8.1 whenever I feel like it, but I will still wait. Maybe 8.2 will be even less annoying and have one or two nice features that I can justify spending time on upgrading, but for now I do not see any reason to do it.