I enjoyed this thread so much!
I used to teach high school, and always enjoyed working with students as they figured out what they wanted to do. Its tough to decide thats for sure!
thanks for letting all of us enjoy reading about your interests!

When I was a kid (im in my 30s now)
I wanted to be:
the place kicker for the L.A. Rams. (then)
(mainly because vince ferrigamo was the QB, i was nine.)
then i wanted to teach deaf kids. (junior high)
then all through high school i thought i wanted to be a professional photographer.
In college though, i found that what I liked most about photography was the fun i had doing it in high school. It wasn't as fun in college, and was expensive.

fortunately, mid way through college i found that i really DID want to teach deaf kids. and i LOVED every minute of it! now i train other people to work with deaf kids.

the point is this: enjoy your time deciding what you want to be and dont close any doors, or decide you can't do something.
just try!