I quite like the fact that all the supermarkets round here have their own intriguing differences and atmospheres.
Personally, I find Tesco a generally stressful experience. Just anecdotal, but people seem crosser in Tesco - it's not laid out very logically, there are about eight little lanes of non-food when all you want is one bottle of shower gel, so it seems to take longer. I always seem to hear more children crying and being shouted at in Tesco.
Which is why I quite like Waitrose, as it does generally feel a bit calmer - and it's smaller and quicker and the checkout staff are friendlier where I am. But it's a bit full of performance parenting and kilted children too!
I don't really like our Asda - it's massive and frenetic and things which are own brands in Sains and Waitrose, they often only seem to have the actual brands. I buy own brands of pretty much everything, so can often end up spending more if there aren't any.
Sainsbury's is the calmest and nicest and most intuitively laid-out, where we are.
I've stood unable to get to shampoo in Waitrose for minutes while a bunch of gilet-wearing brayers banged on about horses. And I've heard some pretty ripe stuff in Asda too, and been blocked by, um, less horsey types. This is true, and much as it would be nicer to say they're all the same and you can't tell an Asda from a Waitrose, you actually can.