I find that sometimes the LQS or JoAnn's have an attitude that you are interrupting them, especially if you are waiting to have material cut or are waiting at the register to check out and nobody is around. When they do come they seem to sail on over in slow speed and have an attitude.
I would enjoy going into a shop that has comfortable music and is welcoming as though you were going into their home. I would stay away from coffee etc because it would be as though you were entertaining them and then the spills and the left anywhere coffee cups.
I think a welcoming atmosphere, soft music, and personel that really enjoy people and their work would be a good start and of course periodic sales so we feel that we feel we are savy shoppers.