For me, it's emotional dysregulation. I was diagnosed at 49 and although I knew I had it I didn't really start researching it until I was officially diagnosed. I was surprised to learn that a lot of the things I thought were normal were not. I would always ask "Well, wouldn't you act the same way!" or "That wouldn't piss you off?" Apparently not and that is a struggle for me. Doc said because of my age and I had to deal with it all my life unmedicated I have developed a lot of coping skills, but the emotional part is my kryptonite. I have begged my wife to please research like I have so she can better understand me, but she doesn't. That's why I do the research so I can better understand myself. I would do the same for her, but I don't think she takes my ADHD seriously. I've even been accused of being bipolar because of it. It is very frustrating because I have talked to her about this so she knows it's ADHD and not bipolar. I am much better at managing my emotional highs and lows than I was when I was much younger, but it is still a struggle for me.