Nice thread.
1) To have control of who live or dies on this Earth. Basically to be impervious to disease and death and to have control over that. This means family and friends live forever! See number two.
2) To pick what age I am as well as anyone else is and to stay that way indefinitely until I decide it changes. How awesome would it be to stay 21 forever?
3) To be totally off-the-radar for the above abilities. I don't want people beating down my door.
Matty, you should also make the caveat you can't wish for more wishes.