To Hawkmoon and King of Pain:
Making stained glass works for hubby because it fills other needs for him.
He spends his work days in 'seeking cooperation from others' mode. He sees one patient after another, and they must all cooperate with him to allow him to help heal them. He must project a positive attitude at all times, no matter what he is really feeling. He helps but nobody gets better unless they are part of it. Also, since many of his patients are there because they need to mitigate problems that occur due to work postures, the job is never 'done'.
All the fine motor skills that make him good at chiropractic adjustments are also useful in glass cutting. But nobody has to cooperate. No people contact of any kind is needed. He can enter his workshop and putter to his heart's content. And at the end, he has something that is 'finished'. He can say - "I did that, all by myself."
As a side benefit, it is also ideal for a family man. He is in the house, and available, instead of off at the golf course or other 'away' location.
Oh, and I did decide some time ago that there was too much stained glass. I banned the making of sun-catchers, and suggested that if there was going to be new pieces, that they should either be big enough to take up a whole window, or replace something, like a lampshade. It didn't work terribly well (note all the masks). But it did inspire him to start bartering. We have an awesome crokinole board (similar to
http://www.crokinole.com/preview1.asp?ID=24) that was made by a friend in exchange for a piece made by hubby, for example.