Author has written 8 stories for Harry Potter, Naruto, Final Fantasy VII, and Gundam Wing/AC.
About me: (updated March 23rd 2016)
My tastes in fanfiction have gravitated to Harry Potter Crossovers, Final Fantasy VII, Fairy Tail, Katekyo Hitman Reborn and Sherlock.
Do you know how to make a criticism without insulting or disrespecting the author? There are plenty of methods out there. The sandwich method is most common that I know of. Initially we start off with a compliment to the author's skills in the story they are working on. Then we proceed to discuss the what offends us, the areas we personally feel need to be worked on. Lastly; compliment the author again, either by restating the first compliment or by pointing out a brand new one. Some people tend to also include how the audience might receive the works of the author if their initial criticism is followed through.
Another method of critiquing is to focus directly on the situation. However doing this can be tricky. The key to a successful critique via this method is to avoid attacking the author, or focusing on the author at all. Saying things like "You should have done this..." or "All this information is wrong, it should be..." instead focus on the actual writing and work itself. Point out the things that need improvement such as "at this point in the story, it feels rushed..." or "that part seemed a bit out of context here versus there..." followed immediately by ways to improve, edit or work around the problem to provide a cohesive and intelligible story.
One of the biggest challenges to writing a critique out to an author is to moderate and use appropriate language. It is far to easy to use accusatory language like "You should" and "If you don't". To avoid this kind of language, use words such as "perhaps" or "maybe." It is also important to leave emotion at the door, so to speak. If you find yourself getting excited, or aggravated, or annoyed with the content of the story, and then proceed to critique it directly afterwords; we all run the risk of allowing those emotions to color our comments, and often results in a poor review and an offended author.
The goal shouldn't be to discourage an author, but to help them improve by illuminating the areas they need to improve upon.
Lastly; be respectful to one another. Unless you've met that author face to face, none of us can claim to know each other. If the author chooses not to follow a critics advice doesn't give anyone the right to fling insults and behave poorly in the aftermath. We are all strangers to one another which is why it is imperative that when making a critique we all remain respectful to one another.