I, for one, started with boards due to availability and budget. There is a lot to learn for beginners about different woods, designs, and tillering without adding the complexity of knots and curves. I think the early successes I had encouraged me enough to keep learning. I might have had success starting with a stave, but I doubt it, since I had no one to mentor me in person. While I fully intend to broaden my horizons and work some staves, I doubt I will ever stop working with boards.