One of my favorites is the Diet Coke Fairy: just drink diet coke with whatever you eat and you will somehow stay slim. Failure.
One of my least favorites is the Whining Fairy: don't take any reasonable action, just whine and hope someone will accommodate you. Failure.
We also have a Valley Fairy: we don't have to be responsible for our shortcomings because ... we live in the Valley. Failure.
One very dangerous character is the Right-Fighter Fairy: I don't have to contribute to a solution, or ever go with the flow. I just have to always be right. Failure.
The scariest fairy of all, to me, is the Someone Else will Pay Fairy: Are you broke? Get the City to pay for it. Is the City broke? Get the State to pay for it. Is the State broke? Get the Feds to pay for it. Somehow the Fairy will fill these institutions' pockets with money to solve our problems. Nevermind that the money is coming from us all the time. Big Failure.
So be careful next time you wish on a star - your dreams may not come true.