You become extremely aesthetic...but a little goes a long way now doesn't it? You become so aesthetic that you become obsessed with yourself being so aesthetically pleasing, that you begin to lose track of friends and family, you become lost within yourself and eventually...I think you get the point.
I wish I was one of the best painters to ever live.
You own Google! (Wow I wish I thought of that...) But...somehow, Bing and a third party search engine overtake the company for the rest of your term as the company's owner.
Wish granted, but everyone will think that you are a cheater and slowly, when you get fed up with the comments you fade away from existence and no one will remember the girl who wish to be smart.
(Wow this just got deep xD)
Wish granted, you have more time to live your life but you become the ugliest and fattest human because you've been neglecting your appearance over the years.
I wish to cure every disease and illness in the world.