I think whether you want to call it 'depression' or sheer boredom, you are at the moment in a position where you are underachieving and it's getting to you.
I have no idea of how you got into this position, but if you managed to bring in X amount of money in your previous position, then you obviously have intelligence that is currently not being used at work. Boredom / depression call it what you want.
As I said, I have no idea what has happened but please, please ditch the 'I'm a white guy' routine - it's not pretty.
Hanging yourself isn't either - talk it out in person with someone, or talk it out on here - we do care and you're here for the exact same reason that we all are
Peace.