But, as practice shows, people are only willing to do things that bring them comfort and convenience, meaning even without extra effort, not everyone would want to play as "blue" for both players... it's a failure. But at least I learned that there's no point in setting other colors. Unless it's for variety, it's fun to play under a blue flag, for example.
I even like playing with colors - it introduces a random imbalance, but I still think it's not very fair.