Stereotypes are a simple way of defining people and can be judgmental, exaggerated, negative or false. We have been presented with stereotypes most of our lives, as the media use them often in the representations they create.
This is because they are common images and we can recognise them (and their message) very quickly.
A countertype is a reverse stereotype, or a positive stereotype.
An original model from which others may be copied, or excellent examples of a stereotype.