First, good luck, and hope if you choose to take on this venture you have the time of your life!
I personally find a quilt shop with warm and friendly staff is the most important. In my area I find if you are not part of the inner circle of the LQS you are totally invisible when you step over the threshold. To me variety is the #2 important thing, but all the variety in the world will not entice me to the shop if the folks inside are cold, distant and dismissive.