Pistachios are one of my favourite snacks right now. I like their flavour and find that they do not cause the same mild digestive problems that almonds can cause me. They also taste better than walnuts, which are slightly bitter.
California Pistachios are the second cheapest pistachios in the supermarkets - a 600g bag of pistachios sells at S$12.80. The cheapest I have found is NTUC Fairprice's 800g bag of homebrand pistachios, which unfortunately appear to be out of stock at the moment. Nevertheless, California Pistachios' pistachios taste slightly better than NTUC in that they have a bit more crunch and freshness to them. The few dollars' price difference might be worth it.