I usually make my own mince pies and think they taste better than any shop bought ones (unbiased of course!).
In normal times, I wait until December to eat them but this year I've already started eating them.
I think the best so far in order are:
M&S
Aldi
Morrison's
Tesco
Although I have a pack of Fortnum & Mason ones which I haven't tried yet! Which ones do you like?