I've got a long list of things I shouldn't buy again, especially foods - either in stores or at restaurants. The trouble is, once in awhile I forget and do it all over again. Years ago I was a better note taker on meals on the menu to skip next time around, but I've gotten lax, which may help to explain why I tend to order the same thing over and over.
Currently on my list of things to skip are various brands of veggie burgers and tofu burgers. I can handle some samples being served up at Costco, but a freezer with a 12-pack is way too much.