To enter people's minds and get them to do what I want!
'These are not the Droids you are looking for'
and all that. It would also render various other powers obsolete as you wouldn't need to conceal yourself, or be able to escape from things by flying, etc etc.
Basically, I will control you all and RULE THE WORLD!! MUHAHA, MUHAHAHAHA, MUAHAHAHAHAHAHAHAHA!!
Just think, everyone getting on, world peace, environmental harmony, no felling of the rainforests, no stupidity, greed, violence, murder, poverty, hunger, cruelty to animals or cyclists being moaned at and killed ever again, etc. Just imagine!
Oh yes, and I'd be a sex God too!!
Now, give me my Nobel Prize please!!