For general selection and quality, Sainsburies. Although there's a huge Asda relatively nearby that I like for the sheer volume of stuff it has - but the layout is a nightmare. Tesco was right next to my old workplace so I know it like the back of my hand so if I want a lazy, mindless shop I tend to gravitate there because it means I don't have to "look for things". I could stack those shelves myself without instructions

.