In some cases, I don't think there is a line that is crossed when a person becomes 'an artist' and stops being 'a hobbyist.'
bearisgray, I think you are very correct. Some are artists from the day they start. They put together wonderful, singing colors and stunning quilts and only have to learn the mechanics of sewing the fabric together to achieve the wonderful original results that they already see in their minds. They make us OHHHHH and AHHHHH from their first efforts.