It is funny, because often things in canon are forgotten, and fanfiction is remembered. I happen to like sticking to canon on a important things... I can't stand when people have characters call Hermione 'Mione' or 'Mia' or Hermie, etc. I also don't like it when they forget Blaise is a 'light-skinned black man'. I don't mind when they change a few things, like middle names, etc, but I also hate when they change 'dates' around or ages, etc. That's just my personal preference. With that being said, if the story is totally OC, and the writer mentions that, then okay, do what you may.
I have gotten hateful reviews from people before saying I'm not canon in my writing, and I'll agree with them, by pointing out that "Dramione" is never canon, because in canon, Hermione marries Ron.
Hmmm.... food for thought.
|Life is hard enough with friends and impossible with enemies|