I am fortunate in that the LQS's in my area are very nice. My one pet peeve though is that the fabric bolts are so tightly arranged on the shelves that it is very difficult to remove a bolt to get a better look at the fabric. I know that they are trying to stock as many bolts as humanly possible but with carpal tunnel surgery and tendon issues I really have hurt myself removing fabric from the shelves. It is impossible for me to return the bolt to it's proper place, so I have glimpsed a dirty look or two because I have to leave them on the tables for the staff to restock. Okay, that is my vent for the day.
I do think offering a loyalty card would be a good idea. If you spend ??? dollars, you get a future discount, or something like that.