Basically what the title says. Sometimes, when I read stories I actually enjoy, I see comments like "XYZ would never do it/behave this way" or "this subplot doesn't make sense because in the books..."
So, which tropes in fanfiction do you like and enjoy even if you know that they're not compatible with canon or they make character(s) act OOC?
I, for example, like when Sirius embraces his Black heritage and/or dabbles a bit in darker magic. I know that book Sirius hated everything connected to his family but I enjoy stories with this trope nonetheless.
I also like when other characters decide to cooperate with Rita Skeeter in mutually beneficial way and use the power of press for their purposes.
And what are your favourite non-canon-conpliant tropes?