I agree. When I build a model, it's for me. I try to make them as realistic as I possibly can with my skills, but that's because I'm building cars I dream about having in real life and will probably never get my hands on. So, I make a miniature instead. If you're into making a car with a jet engine on the roof, wings, and no firewall, all the power to you. You are indeed, building the model for you. Building things like other people want you too is no fun. It's your money, your plastic, your model, and most importantly, your imagination. That's my take