When I was a little kid I was always outside, climbing trees, making "elixirs" out of stuff I found in the garden, in the ocean, on the beach, hiking, biking, everything. So I became a biology major. I figured there were sooooo many things I could work in. In high school I worked at an OB/GYN and did 500 clinical hours, so then I learned about medicine. Now I work in health promotions (applying to PA school) and scuba dive for fun.
You have to decide what is a hobby and what is a career. Some hobbies you can't make careers. I know that I couldn't be a marine biologist, or in research, I have to be around people.
Try and find something that you love, or at least like to do and pursue that. As has already been mentioned, some hobbies are difficult to turn into a career, but it's still important to find something that you're interested in, which is sometimes easier said than done.
Which do you see as a better business decision? Making more money but working more. Or making less and having much more time to do what you want (either to play more or take on more time consuming business...