1. Lack of spacing in paragraphs.

This is a grammatical error. Learn your grammar, than revise your fanfictions and all your other books; trust me, you'll appreciate this.

2. Lack of capitalization.

Okay... Capitalize the beginning of your sentences and your I's when you're talking in first person.

3. Lack of spelling.

This isn't just Harry Potter terminology, this is about horrific spelling in general. People misspell words in fanfictions all the time, and when it's repetitive, it drives me insane.

4. Please, try your best at grammar. If you feel you are inept at grammar, find an editor. Hate to be rude, but it's true. And I'm not immune to misspellings either, that's for sure.

Have any pet peeves in Harry Potter fanfictions? Comment them here and I'll add them to this book.