There are too many fandoms that were ruined for me purely by the hand of those part of the community. Admittedly, because of these people I haven't even bothered to touch certain shows at all, such as Steven Universe and My Hero Academia. Sure, all fandoms have their rotten apples, but in...
Focusing.
I have never been officially diagnosed with ADD, but I wouldn't know how else to describe my severe lack of focus. (Apologies if this is at all offensive.) I have a hard time staying on 1 topic, project, video, book, whatever else. I get distracted easily by noise (mostly disruptive)...