Hope this is allowed. I am curious--I am hopeless addicted to fanfic and can't really get enough of it but I know I have pet peeves when I am reading and can turn me away from a story quicker then a vampire.
I know two of my biggest pet peeves are when authors struggle to use exact quotes or cannon references in their fics. I think the second one is when the caricature the character Bella the Bumbling and that is pretty much her through the whole story or Emmett the sex fiend. I don't mind Bumbling Bella, Sexaholic Emmett but give them some substance KWIM?
What are your pet peeves?