Ken here with some observations...directed at no specific writers, but as a (hopefully) friendly piece of advice for all writers.
Many of the writers here use familiar actors and actresses as the templates for their characters. Fair enough. There's absolutely nothing wrong with that.
One thought, however: many writers use the real names of the actors and actresses for their characters. I say: exercise your creativity. Put in a little more effort to create original names for your characters. Not only will this help to distinguish your characters from the actors/actresses you envision as portraying them, but it will also lend greater depth to their characters.
The great fiction writers often named their characters with incisive thought and inspired creativity. It's a wonderful thing to see as a reader, and an even more wonderful experience to have as a writer. When you name a character, that character truly becomes *yours*, and the character's identity truly becomes his/hers.
So let's give it some thought, folks: if you've come as far as writing and submitting your fanfic, do it as best you can by properly naming your characters.