I've been a bowyer for 20 yrs, made over 750 bows. There are a couple of bowyers out there that when I pick up one of their bows, there's magic to it. The beauty takes your breath away. The craftsmanship of the details, the creativity of materials they used. Of course, it needs to shoot well too :>)
Its okay to be self named master, if your work is in this catergory. Don't get hung up on if there is a paper to say they are master, you see it in what they make.