Common misconception - Games Developers play their own games. 
Reality: Beyond testing this is rarely true.
Developers  rarely play their own games, even when they do they won't play them  nearly as much as any of their fans.  The thing is developing a game is  rather like writing a novel.  When you spend so much time working on it  and fine tuning the details of the story and the events that occur etc  the "map" of the story becomes second nature.  When you spend that much  time on something it becomes rather like riding a bicycle, something  which you don't really forget.  Going back to things you did years ago,  looking at the code it may seem like it is written in another language  but the moment you start playing the game the storyline comes back to  you.  No matter how much depth you add, the reality is that once you  know the inner workings and how it ends there's little enjoyment to be  found.
The fun and the challenge for a developer is perpetuated  by the development process.  For a Game developer playing the product is  not the game, coding the product is the real game, the source of all  challenges and obstacles to be overcome.  Looking back at code and  adapting it, adding in new features and changing the world of a game,  that is where the fun is to be had as a developer when it comes to old  games.  Consumers for a long time never got to experience this but more  and more there are titles that open up development albeit in and  incredibly simplified manner through editors and tools like the steam  workshop etc - these store the potential to turn a gamer into a  developer and in my view they should be encouraged.
Now there  will be those that will argue, citing the "Myspace effect" where  essentially people who really shouldn't venture into these fields will  do so, resulting in some sub standard games being produced, akin to the  wannabe web designers aplenty that pimped out their profiles when  Myspace decided to allow full HTML.  To them I argue that this is a  necessary evil.  If youtube was a closed platform we would not have half  of the quality content that it contains today.  Youtube does have a lot  of crap on it and finding the gold can be a challenge in itself, if you  will youtube is the modern day equivalent of prospecting, you set out  to find something worthwhile in a myriad of garbage. 
The problem  here is not the fact that people can try, the problem is the way we  rank their efforts and if you can find a solution to that problem then  you will be worth a fortune, you will be the next Google, which in many  ways achieved this with their search engine for finding websites, but  even Google can't tell you what is interesting and what is crap.  Google  relies on many things but it has not achieved the ability to judge  quality.  Google+ and a number of other services run by Google have been  aimed at finding ways to achieve this but they rely on people and their  collective judgement and the sad reality is that we can be victims of  our judgement.  Popularity often ends up succumbing to a positive  feedback loop and many websites over the years have become popular  simply for being popular.  Facebook is a prime example, it was once a  useful service, but today the validity of its popularity is  questionable.  
I don't say this as a desire to appear in any way  a hipster I simply state the truth that a lot of people have realised:  when you step back and look at the services we use, are they really the  best of what is on offer or are we using them simply because they are  what is popular?  A social network by its nature has to be popular to be  successful if it's not popular you can't really use it, which makes it  incredibly hard, almost impossible to choose an alternative.