1. A Starship, with "transwarp" capabilities so that I can explore the entire galaxy.
2. An extended lifetime so that I have the time to explore millions of worlds and phenomena.
3. A promise, not that I may instantly learn the truth behind the existence of the universe, but a promise that I will someday discover the answer myself on my travels, before I die.
My dreams would come true. I don't dream for an end, I dream for a journey! I would love nothing more than to explore space on such a vessel, damn you Star Trek for implanting these unattainable fantasies in my head

I would of course have to employ a crew, I would consult various MMO-champ users I respect to see if they would like to join me

(Anyone with a Star Trek avatar/name gets a free pass).
I would do what I could to improve the Earth itself, bringing plentiful resources, and introducing the people of Earth to extra-terrestrial species. People would listen to me if I was in command of a collosal vessel of such incredible power, so I could probably change some things, and stop many atrocities and bring prosperity to areas of the world in poverty and destitution.
Some day mankind, some day...