Finally, from my experiences a fun environment is a must for creative people. Agree or not, software developers are some of the most creative and imaginative people on the planet. Building software is as much art as science and will be for many years to come. If you are surrounded by people in suits and cube farms, then creativity is probably suffocating in a constipated bureaucracy. And, besides, it is difficult to get sufficient blood to your creative brain with a constrictive leash around your throat.