Speaking of tedium. Me and a friend know a guy with #ASD and who was absolutely mental at tedious tasks. "Do this until we tell you to stop." and he'd just keep going. One of his favourite games was WoW because of all the grinding. He was also a great metal guitar player for the same reason. Relentless monotonous practice until perfection was accomplished.
Unthinkable for me. I have #ADHD, so I'm pretty much the exact opposite. I virtually never rehearse anything. I play the keyboard but I can't even play through a single song. There's just no patience. Certain keyboard techniques are inaccessible to me for that reason. They're just too tedious to learn.