Meh, I don't ever think there's a reason to think over past events and debate the merits of choices internally.  That will just get you more into your mind and not able to respond to the present.  Whatever happened, happened and its one's choice to accept it and surrender to whom you are.  We are not our past choices, but the sad truth is vast majority of us live in our past conditionings because we can't accept that this or that which didn't turn out the way we liked.  I think we should all devote a period of our day to quiet reflection and watching our thoughts so that the stresses and tensions of our decisions don't accumlate and we end up truly trapped.  Beating ourselves up, however, won't get us anywhere.