I had lttle interest in numismatics until I started helping my father Select Currency around 2007. I quickly realized I needed to educate myself and soak up all the information I could from the my father and others in the coin community.
After helping at trade shows and picking up a few things of my own, my father tossed me his hoard of pennies that had accumulated over the decades and said "you need to learn how to grade, start with pennies." Since then I haven't looked back.
My father is a wealth of knowledge and I couldn't ask for a better mentor. Nowadays, the most rewarding part is the relationship we have developed, I wouldn't trade it for the world.