What I like in a quilt store: friendly- helpful- knowledgeable staff, a variety of fabrics that includes lights and darks, good lighting, lots of notions, space to move within the store, and classes. Over time a friendship between customer and staff creates a shared joy of quilting. Train your staff well. I've been in some shops where I felt like I was an intrusion to their day. Talk to other shop owners, check out other stores, get a feel for what works, and if you decide to go for it, have fun.