.......Then there's all the fun of learning about shaping the sails with the various adjustments to get the characteristics you want.  It takes about 10 minutes to learn to sail a yacht, and about 10 years to learn to do it properly in a wide range of conditions.  That's the real fascination, every session is a new experience, even on the same pool.  And, of course, being a nautical hobby, the vocabulary is anything but constant around the world to add to the interest.......