A common version of ADHD happens when the person brain doesn't produce enough dopamine, so the person in question keeps seeking more, so people with ADHD often have addictive behaviour, even to stuff people didn't considered addicting at all.

But this variation of ADHD also can make the person a high performer, often the best dopamine kicks come from doing interesting work, for example coders doing new stuff or fixing really bizarre bugs, or a CEO having to navigate the company through a very tricky situation.

There is some resaeerch trying to figure out if it has a link to hunter genes (ie: people with this variation would be more inclined to hunt, and be persistant during hunting, at same time switching targets if necessary, but these adaptations make the person poor in following schedules, thus a poor farmer)