I've always wanted to be a teacher.
This is mostly true. There was a brief time where I thought I wanted to be a programmer instead, and some doubt in the middle of college. Otherwise? I've wanted to teach practically since I entered school.
I still remember, the summer before my younger-brother-by-3-years (I have 4 brothers) entered school, I made him come to two weeks of "school" with me. I don't really remember what I had him do, except that he had to spend 2 hours with me and what the chair he sat on looked like.
Since I can't even remember not wanting to be a teacher, I wonder about other people who teach. How did you realize you wanted to be a teacher? Did you doubt your career choice as a pre-service teacher, a newbie? Do you doubt it now? How do you deal with doubts? How did you decide that teaching beat out the alternatives you'd considered?