We all have favourite shops. We like the staff, or we like the products or any combination of things that make that our favourite place to shop. That is good; we know what to expect, we feel safe and we feel like the shop understands and caters to our needs. The problem with that, especially if it’s a grocery store or supermarket, is that we start to limit ourselves to other services, other people and other products.
Going to new supermarkets in a practical sense makes more sense anyway; you can try out other products from their own brand ranges and see which you prefer, but you also get a better idea of prices from other supermarkets on your favourite products. By letting yourself get sucked into brand loyalty you find yourself blinded to the values of other places, and you might even save yourself a bit of money as well.