Finishing things

I thought I'd start a create a new thread on this topic, which has been getting a lot of play on another thread lately.  

I wonder if my husband, who has ADHD, has a hard time finishing tasks not only because of the attention/focus issue but also because of perfectionism.  It seems that he might be thinking, "If something is to be considered done, it must be perfect."  And, as we all know, the state of perfection is nearly impossible to reach.  So, by not finishing, one is also avoiding whatever feelings are experienced when things are not perfect.  Any thoughts about this?