I am not a mechanic. I can do general maintenance... oil changes, replacing bolt-on parts (like a thermostat), but after that I pretty much leave it to the professionals. I only understand about 25% of what these guys are doing, but watching a good mechanic work... with all of the right tools and such... is just fascinating to me. Even in a case where its just a run-of-the-mill motor with nothing really special done to it. I just like watching those guys explain not only the "how" but also the "why".