As someone who is relatively recently diagnosed and still noticing new features of this condition, one of the most frustrating things for me is recognizing that my husband probably has ADD too while he seems completely oblivious to it.  In our case there's a very fundamental difference in the way each of us operates – I'm left-brained to an extreme while he's right-brained to an extreme – that makes it hard to see the similarities.  But the truth is we both exhibit a nearly identical constellation of ADD-related behaviors:  talking too much, not putting stuff away, letting things pile up, not being able to get out the door, forgetting things all the time, interrupting/not listening, losing track of time, procrastination, hyperfocus, perfectionism, overcommitment, people-pleasing….   In hindsight, I think the reason I was so comfortable with him when we started dating was because our behaviors were so compatible – I never felt like he was judging all those things I didn't do well.  26 years later, he doesn't believe I actually have ADD – and he tells our kids that, too – but he humors me since the diagnosis has motivated me to work on some of my issues.  I have not yet tried to talk to him about this yet, mainly because he's working on some other issues of his own so I think it would be counterproductive right now.  But writing this has brought me to an intriguing thought:  maybe he doesn't acknowledge that I have ADD because subconsciously he knows he's the same.  Hmmm.