Awhile back my daughter and I were having our regular argument about Hufflepuff (she thinks they are lame and I think they are the best), during which she presented a theory she said she read some-random-where which posited that, really, no one is truly sorted into Gryffindor like they are sorted into Slytherin, Ravenclaw and Hufflepuff. Really...really...everyone is either a Slytherin (Harry), a Ravenclaw (Hermione) or a Hufflepuff (Ron). What makes someone a Gryffindor is that they ask to be one, and the hat grants their request because they were brave enough to ask.
There Is No Gryffindor!!!!