I'm a lifelong sufferer myself, and so I like to jest.... forgive me
What you say makes sense and matches the neurology. I find that maintaining my dopamine levels can be a challenge, and on the extreme end, definitely associated with fatigue severe enough to lose track in the middle of a conversation.
Problems with the reward system and executive function are definitely part of the spectrum though! I identify with the symptoms you describe.
Today I'm on wellbutrin for the first time, and Im finding it more effective than amphetamines, despite perhaps an increase in social awkwardness. YMMV
Everybody with ADHD is slightly different, but for me it’s more of a disconnect between future rewards and present internal motivation. It’s not an issue when I’m talking to somebody – – that shit is all in the present and I thrive in the moment.
What I can’t do well at all is make my brain feel like a task is important, rewarding and worth doing if that reward will come far in the future.