Pet Peeve: Getting great reviews for other writers work. I see people using Castle episodes and a few movies and they steal the lines verbatim. A line here or there is okay, but when you write a couple paragraphs taken in its entirety from a movie, you don't deserve the accolades.
There are so many stories on fanfiction that are never finished. I wish it would be required that stories posted must be submitted complete. As a reader, you get involved in 30 chapters or so only to discover they have abandoned their story. Or you get a writer that finished a chapter in 2013 only to come back and write another chapter in 2016 before abandoning it again. Below is a small list of writers that finish their stories.
Trusted (All stories finished) 1/5/2017
Aalon 17 stories
Bravevulnerability 144 stories
CheerfulChemist 69 stories
Chezchuckles 264 stories
Djinni14 29 stories
Garrae 36 stories
Jude Rigby 37 stories
Perplex13 10 stories
Skygirl55 53 stories
Stanaticfantatic 76 stories
Where's Beckett 35 stories