I wanted to know is it alright to write your college essay about your dreams/aspirations for the future?
I don’t see why not as long as you make it original and add a unique perspective.
It is totally okay to write an essay about your future goals and aspirations. However, I would suggest to adopt a unique tone of writing so that it doesn’t sound cliched and generic. You can look at college essays on future dreams and aspirations at http://www.studymode.com/ for reference purposes.