2 Answers

Sound a lot like Bi-Polar.  Maybe OCD but  usually the intense desire is replaced by another with OCD. 

 ADHD usually  will not hold your attention for long  and you cant complete tasks

 With Bi-Polar (Manic Depression) there are other symptoms such as extreme mood swings, (aggression in children) .

when the Manic is manifesting they can become giddy,playful (even to the point of driving the other person crazy because they just wont quit) It can be very annoying and tiresome to others ., Because the things they do are funny to them but  they push it too far.

The Depressant part shows symptoms loss of apatite, sleeping a lot, irritability, loss of interest in normal activity,isolation crying ,thoughts of suicide, 

Not all symptoms effect everyone  there may only be a few . But there can be more than one mental illness  that a person may suffer from. The best thing to do is see a Mental Health professional .

I cant stress this enough_ mental illness is not a death sentence its simply a diagnosis.If you were diagnosed with diabetes you would take medicine  and never think twice. Bi-Polar is a Serotonin imbalance in the body . Some times it produces too much and some time it doesnt produce enough. medication can balance that out in most cases. 

FYI I'm Bi-Polar and so was Einstein, Issac Newton, Bach, and anyone that made a difference our world so that it could develop to what we can do now. Why?because we think outside the box.  We made this world and all its technology. So Its a blessing in many ways.   

Thank you I was gonna add epilepsy too which I have but my point was its like any other illness. I work for Mental health now as an advocate and we do think outside the box .We can see in but its just too confined for us. They cant see out so we have the best of both worlds