I'd go on and on about all my pet peeves, but honestly, pretty much all of them have been already stated in this thread, so just know that I agree with all the pet peeves listed in this thread [ESPECIALLY the one about wolfspeakers, dear god]. But one that I haven't seen anyone mention are the unrealistic bonfire horses.
Like y'know, the ones with either white fur and black mane, or black fur and a white mane, both of which are impossible in real life as far as I am aware.