At 22 years old, I am now in my 4th year of college, but I've collected a pretty rich knowledge of everything about Apple products in the last ten years. It's my hobby and business to buy broken Apple computers (mainly laptops) and refurbish them for reselling. I started a long time ago in junior high with my 1999 Lombard PowerBook G3 when iFixit.com was pbfixit.com! It's been a blast teaching myself through experience the Jedi ways of troubleshooting Apples. If one thing's for certain, it's that learning is constant.
I have been working as a troubleshooter (board testing and repair) for R2Sonic, and it's been an incredible educational process as well. Hopefully some day, I'll be repairing Apple logic boards with little hassle. I'm pretty darn close to that now!
We should all meet our challenges with excitement and confidence. That's what drives me, and I love it!