Only one wish? There is sooooo many things that I would like to wish. I cant choose one...
Just watched Harry Potter again today so I wish I was a wizard in that world! Or to be like John Carter and be transported (kind of) to Barsoom expect it would Lowlander of Mars. Or to gain super powers and be a hero in the Marvel Universe. Or to go to sleep because I have work in the morning. Or to be one of the Dunedain in Middle Earth. Or an extremely wealthy and gifted swordsman in Westoros. Or or or or or or... There is too many.