One of the non-programed events I attended at Comic-Con was a small, informal cocktail party with a producer of a popular TV show, several writers, actors, etc.  As I was getting ready to leave for my panel my host asked, "What power would I have if I were a superhero?" 

For some reason the question took me aback, and put my brain into freeze lock.  I flashed through the usual -- fly, invisible, teleport, etc. -- and then I said.  "To be practical."

Now it was his turn to be taken aback, and he turned it into a wonderful running riff of my application to the Justice League.

I felt sort of stupid, but back at the hotel I analyzed what I had been saying, and I realized I was right.  That was the super power I craved.  The ability to evaluate every situation, and make the most rational decision that would have the best result for me and mine.

I've made some very foolish decisions in my life.  If I was Practicality Girl I would have avoided those missteps.