Editing Audio. I love coming up with new ideas, scripting, animating anywhere from 40 to 80 hours per video. but audio is a drag to the point its slowing down the entire process. Its a baseline of the video and I cant say Im a great voice actor. On top of that, sound editing is the least creative part of animating cos I usually already know where everything is supposed to be whereas scripting and animation are extremely flexible and fun to work on. And on TOP ALL OF THAT...I have to listen to nothing but my own voice for several hours and thats awful lol. When I animate at least I can lower it down a lot and listen some other music in the background.