I don’t know whether it is ‘the best’ but one that I find springs to mind quite often is a moment with a new Christmas present once. It was one of those walk-along-then-spin-and-shoot robots - a very simple thing, since this was in the early '70s. However, my memory is of utter joy and entrancement as I set it going then leapt out of the way, on to the furniture, before it opened its chest and fired.
It must have been a present from my parents, so they were probably happy that I liked it. Whether they were quite so happy after the first hour or two of the same thing, I don’t know.
It is 2.4km to my nearest shop (and most of that to reach a bus stop, as it happens). I have walked there from time to time, but I wouldn’t do an actual grocery shop there anyway: we have the weekly groceries delivered.
I have brought a full grocery shop home in a large rucksack that kind of distance, and more, in the past when on holiday, but I wouldn’t want to do it regularly.
I have also known a couple of other people who do that kind of distance with a huge rucksack for a monthly top up of specific things that their local shops don’t carry, but they are both weird in several ways other ways. Good weird, but still weird. This is not something that the majority of people that I have known would even consider.