I used to live in Highland Village and went to Quilt Country in Lewisville a lot. They have a tremendous selection of fabrics and tend to leave you alone to browse and look. In other words, they don't hover over you and follow you around the store. Maybe that is why an earlier poster felt they were not very friendly. However, when you request help, they jumped in and offered assistance. The owner of the shop makes a lot of patterns so there are always plenty of samples in the shop to inspire you. Most of the patterns she makes are fairly easy to do and she has no qualms about you taking pictures of the samples. I've been inspired to make quilts from her samples and purchased fabric their but did not necessarily purchase the pattern if I felt I could make it from seeing it and from having a picture of it. I highly recommend that you check it out.
I don't recall the exact address but think that it is on the west side of I-35/Fox Avenue intersection in Lewisville.
Another suggestion - join the guild in Dallas and you cn learn about all the local quilt shops through them. There are other quilds in the surrounding areas, too.