Confused about happiness in relationship

I've been with my wife for almost ten years.  She was diagnosed with ADHD during the first few years of our relationship.  It's been difficult, but we both got counseling, education and she's done a lot to help herself, meds, reading, apps etc.

Fast forward to today.  I love my wife, but am not sure that's enough.  I still feel at times unfulfilled.  She uses tools to remind herself to show affection, routines and lists to make sure she attends to responsibilities...

We have fun, though sometimes intellectually I feel like I'm talking to a child.  Emotionally, I don't always feel understood by her, compared to some of my friends.  She's learned to be more giving and express support.   Yet... 

I'm not quite sure what's amiss... leaving her doesn't feel quite right.  But there's something that needs improving... I need some feedback... prodding... questions?