What do I want to do when I grow up?

When I was younger and applying for college, my least favorite question was what I wanted to do when I grew up.  It was a difficult decision.  I finally decided to be a doctor.  Since I have started medical school, many times I have been asked what kind of doctors I would like to be.  Are you kidding me?  There are more than 1 kind of doctors? I never thought about it, just always wanted to be a doctor, that's all.  I already made a career choice to be a doctor, and now I have to go through that pain to think about career choices again?
I remember taking the personality test for career choices in medicine and the result showed that I should do aerospace medicine!!! Yeah, right, I had no idea what that was, and still not interested in looking into it.
So I took a list of different specialties, and start crossing out what I didn't want to do.  The only thing I could cross out was surgery, yes, anything surgery related was out of my list.  
My pathology professors in medschool were fantastic and that gave me a bit of interest in pathology. I wanted to be a "doctor of doctors".  So I went to visit pathology lab one day, and coming out from that lab, I knew it was definitely not for me.
Then I thought I wanted to do Emergency Medicine because I worked in the ER for years as a clerk and loved how exciting it was.
Until I took some OMM-Osteopathic Manipulation Medicine, I fell in love with it.  I wanted to practice OMM.
Then I started my family medicine, and loved it. It was a bit slow and repetitive but I could see myself doing it. Now, I still have a list of a bunch of things I would not mind doing.
And, surgery rotation came along.  I was not excited for it at all.  The first day in surgery, I was pimped bad.  I was nervous, got asked so many things that I did not know, my mind went completely blank.  During the first week, every night I came home, I just wanted to cry.  I got yelled at so much by everyone, from the techs, to the nurses, to the surgeons.  I felt so stupid every day and felt like I was the worst medical student ever.  I worked so hard, and studied so hard, it seemed like I didn't have time to sleep anymore.
One day, my roommate told me that she thought I was bit by a surgery bug.  I stopped and thought to myself.  Holy cow, I probably have been.  I have thoroughly enjoyed surgery so much.  After 12-14 hours standing in the OR, I still felt energetic, happy and excited.  I came home with joy every night.  My feet hurt from standing all day and I couldn't even stand, but collapsed on my chair as soon as I got home, but I still felt like I have so much energy to do things and look forward to going back to the OR. I started to volunteer to come in on the weekends, staying later and starting my days earlier. I immersed myself into surgery and realized how much I loved it.  I never thought I would love anything that much.  I didn't have weekends off for 2-3 weeks straight but I still felt good.  A 12 hour shift used to sound too crazy for me, became quite a breeze.  16 hours was a good shift for me. 
I think surgery is it.  People tell me how crazy I am for thinking about it, but I truly love it.  It is not like any other specialties that I said I wouldn't mind doing.  I think I would be very sad if I don't get to do surgery now.  I'll need to study harder, much harder and shoot for a residency spot in surgery.  I'm happy to finally find out at the age of 30 what it is that I want to do when I grow up.