I saw XKCD #584 - "Unsatisfied" - this morning. In the comic (in a slightly Sliding Doors way), a man chooses between one of two lovers, and spends the rest of his life thinking about the other one in a "what if" kind-of way, leaving him ultimately unsatisfied with his life, regardless of which he chooses.
Go read the comic if you haven't yet.
I had a slightly smug moment, and 'shopped this together:
I had pretty much the same smug moment...