Giving people who aren't car enthusiasts advice on buying a car when you are a car enthusiasts is one of the worst things in the world. They ask you because they think you know a lot about cars, which you do. And that's the problem.
The part of the population that doesn't know a whole lot about cars usually has a lot of outdated notions about cars, something Matt delved into today. Which is really difficult, because you have to spend a lot of time explaining that certain beliefs aren't true anymore or that what they think they want isn't really what they want and feelings get hurt in the process.