As a customer, I do not give a flying fuck if you are 10 years old or 45. If you know your shit you know your shit. The automotive repair industry to me is based off of word-of-mouth, honesty, and the job that gets done. I don't give a fuck about your 25 ASE certs or fancy toolbox if you are an unhonest bastard.
Now, that is me. The soccer mom driving the broke ass minivan wants the best price.