You mention dragons being an iconic fantasy creatures and you are right. This comment is based on that alone and not with PGs world. With that said, when games start letting players be dragons, I think it cheapens what a dragon is in that typical sense. They are usually rare, powerful and ancient, not abundant creatures standing around a well auctioning, dancing and reading poetry in an inn.

I understand someone's desire to play them but in doing so I think it destroys what they are or stand for.