What do I want to be when I grow up?

I am finding myself at a turning point in my professional life.  I have had the same job for nearly 15 years and am now at a crossroads where I must choose a different path.  The job that I have been in chose me rather than me choosing it.  I was asked by my Dad to answer phones for a few days while his secretary was out of the office with a sick kiddo.  This was in 2001!  I stayed on at his request and moved from secretary to office manager to owner when, in 2009, he retired and I bought the company.  The company is an oilfield repair and machine shop.  Never as a little girl playing dress-up did I say to myself, "When I grow up I want to own an oilfield repair company and have employees that work on drilling rigs!"  Never would have crossed my sweet, ambitious, and imaginative little mind.  "I want to be a doctor, I want to be a marine biologist, I want to be an archeologist, I want to be the little mermaid," are the thoughts that filled my innocent little toe-head blonde covered head.   Now I have this amazing opportunity to re-create my destiny, to mold my future in any way that I can imagine and to a step in any direction that I may dream up.  Problem- I have no idea what I want to be when I grow up!!! The growing up happened when I wasn't paying attention and now I am here, I am an adult, and I am clueless as to what I should do next.  Turns out adulting is hard.  Who knew? It has been such a long time since I thought to myself, "I want to to be a _______ and do _____ with my life."  As I mentioned before the job that I ended up spending 15 years of my life doing just kind of landed in place without my having done anything to place it there.  I have never had to "choose" a career and am having a difficult time doing so now.  The dreams I had as a young girl no longer seem viable or achievable and apparently being a mermaid won't earn a 6 figure income.  So, where do I start?  The possibilities are endless!