I mentioned this a little while ago in the forums, but this is a nice article from Bitmob user Allistair Everett that discusses how unwanted bugs and glitches can actually be enjoyable. Here’s a snippet from the article:

Sometimes, when the character you’re talking to randomly spawns from the sky and falls to his death, well, that can be a mood breaker in a game like Fallout 3. But it’s also a special sort of fun. The problem is when you go looking for it: You can wait endlessly for lightning to strike twice at the same spot. Sure, Garry’s Mod and Crysis‘ dev tools allow us to manipulate the game to do things we wouldn’t see otherwise, but there is something special about these scenarios happening naturally, without any player input.