I mostly shop at Safeway because their prices are very good and they seem to have the shortest check-out lines. There is one on my way home from work. I usually have to stop and pick up a few items nearly everyday. The fuel bonus and miles are the icing on the cake. I've also received some free sandwiches with their sandwich club and even won a Weber grill in a sweepstakes.
Some of our other markets get my business because they have better meats, produce and deli items.