If you could be anything in the world or do anything in the world what would you do or be?

I would own a TARDIS.

PhD in general studies.

I’d like to be a successful playwright but I’d settle for being an unsuccessful one.

The Akond of Swat

If I could do anything in the world might take a bit, but in short, I would be so charismatic that what I suggested to make the world better all leaders great and small will be eager to do without question.

My secret ambition is to do stand up comedy, but I do stand up comedy every day in my every day life as it is. lol
My youthful dreams and ambitions have lost a lot of their polish. At this stage of the game I just want to sit on the porch with a glass of wine and watch the sun set, even though I am still working hard.
I have been lucky enough to live in a beautiful rural mountain area for decades and now am living on a ranch in the Sierra foothills.

Kicking back with a glass of wine on the expansive veranda after a day of horsing around is good enough for me, along with cracking some jokes and launching into some improv. with my friends. :-)

Be? wealthy without a doubt.
Do?
I have always had a secret dream to try this.
http://youtu.be/WRqnTODwvEA

It may sound stupid, but I have always secretly wanted to win a prize for a book I write. I want to write something innovative, or at least more innovative than most fiction in my country. It’s not really because I want a prize, I just want to make something different.

I once went so far as to tell my friends about that, and what I received was some laughter for being too dreamy :P

I want bottomless talent. Whatever I apply myself to, I’m the best.

Of course, the first thing I want to apply myself to is extending the human life so I have years of productive talent.

I would like to be able play the trumpet as good as the greatest trumpet player who has ever lived Wynton Marsalis

I’m fine with the fact that I don’t really know what I want to be when I grow up. Today, I want to be amazing.

I would own some type of animal sanctuary and have enough money to have plenty of people helping me.

I’d like to be a successful fiction writer. I don’t want to be famous as much as I’d love to write fiction for a living. I have stories in my head but my writing is all in the non-fiction realm.

Same as @Earthbound_Misfit I want to be a fiction writer.

I would be a singer with a passion for performing. I don’t want to be famous I would just love to be able to make a living doing something that I have a talent for. As it is, I hate being on stage so am not using my voice to the best of it’s potential.

Failing that, I’d quite like to be @Coloma, except, change the wine for whiskey!!