When did you "know" you were a car guy?

I still don’t think that I am a car guy. I never had any formal training on how to fix anything. I just read the instructions and do my best. I just like cars, but not so wonderful on working on them.
Not many of us had formal training. I use to read Motors Manual to obtain the most knowledge of many systems. You're a car guy if you enjoy driving them, going to shows and swap meets. Certain work you may have to call on the pros. It's OK.