OK, how about something a little lighter? (maybe) Instead of trying to define a "difficult child", how about if we define ourselves? I'll start... You know you're the parent of a difficult child when... 1) You consider a doctor's appointment to be a social outing. 2) You look for ways to sneak out the "back door" when you see the parents of "too-easy child" kids show up. 3) You overanalyze every statement your kids make - difficult child or not. 4) You can't sleep because you're worried about what difficult child might have done... or didn't do... or is going to do. 5) You're on your 2,945th hiding place for your wallet. 6) You're thankful that today is not as bad as yesterday, or at least not as bad as a "worst" day. 7) You've been disowned by family, because they don't believe that there's anything wrong with difficult child except your parenting. 8) Your kids are "old enough", but an uninterrupted night's sleep is still a luxury. 9) You second-guess most professional opinions, unless you reached that conclusion first. 10) You second-guess your own opinions - whether or not the professionals agree with you. What else defines "us"?