From California. There's many very good one's in this state. So I limit my selection by places I frequent and type fabric/books they carry.
They must be friendly & knowledgeable or I head for the door. I'm an art quilter, so I want fabric & books that enhance art. The selection must turn over often enough to always have new to choose from.
So my absolute favorite is in an art community. The community supports art and art quilt events. It's a large enough community and a lot of tourist traffic to support turnover.
It's located in Pacific Grove, Calif on the Monterey Penninsula. Asilomar is there and hosts Empty Spools Seminars. It's Back Porch Fabrics.