I wanted to be a pop star when I was little, but I could carry a brachiosaurus further than I could a b-flat.
In middle school through 'til the end of my first year in college, I wanted to be a writer. I still exercise my writing ability with short stories and scripts, and I still actively study literary theory via articles, workshops, and TVTropes. I'm not really banking on becoming successful through it, however.
Right now what I AM DOING is double majoring in business and environmental law/ethics, to graduate with a Masters degree and start a permitting/consulting business for companies looking to "go green". Eventually I'll retire and use that Masters to teach at college level.
What I WANT TO DO is open a Steampunk-themed cafe and bar in London.