These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Gamer Girl
Mary Sue: Many detractors of the book accuse Maddy of being this.
Moral Event Horizon: The Haters cross it when they deface Maddy's manga and post it all over the school.
Wangst: One of the main reasons some people don't like Maddy or the book.