To hack the world.
To make every Good Thing in our lives faster, more open, more accessible, more adaptable.
To learn from the great examples of the Bad Things, in order to reverse-engineer them and put them to work for good.
To help spread the thirst for knowledge and creativity.
How this applies to me... well, I've always thought that what the world really needs is not more stuff, but better use of the stuff we already have. To take a very local example, your computer - if you're using it to do something that can be described more easily as "Work" than "Creation," then you're not using it properly. A computer is there waiting for you to tell it what to do, and then to sit there and do it.
I hope to shift people's perceptions of machines in general and computers in specific more towards the viewpoint that work is for machines, and creation is for people, and the two should not cross. Hopefully, that'll inspire better machines, less work, and more time for humans to spend doing things that really matter.
(apologies if that didn't make much sense, it's ten to three in the morning here, and the whole "Becoming an Early Riser" thing is something I'm still struggling with)