The designer may be displaying a confirmation bias by assuming that everyone would want a game character that closely resembles themselves. They may have only considered their own preferences and not taken into account the diverse preferences of their target audience. This bias could have led them to overlook the fact that some players may prefer to have more freedom in choosing their avatar, rather than having it assigned based on a survey.

This bias could result in the designer creating a game that may not appeal to a wide range of players, as not everyone may want their avatar to resemble themselves. By considering a more diverse range of preferences and allowing players the freedom to choose their own avatar, the designer could create a game that is more inclusive and appealing to a wider audience.