Disappointment
It's hardened on Dick Armitage's dreams(via The Road to Surfdom):
"I'm disappointed that Iraq hasn't turned out better. And that we weren't able to move forward more meaningfully in the Middle East peace process."
Then, after a minute's pause, he adds a third regret: "The biggest regret is that we didn't stop 9/11. And then in the wake of 9/11, instead of redoubling what is our traditional export of hope and optimism we exported our fear and our anger. And presented a very intense and angry face to the world. I regret that a lot."
I think we all do. Well, maybe not all of us.