I've been meaning to contribute to this thread for a while. I love it. It's one of my favorite threads on LTH--super helpful information, mothers and sons (i.e. mother and son), wives and husbands (i.e. wife and husband) chiming in. It's wonderful.
As for products not already mentioned, I like Aldi's string cheese (the regular kind; I don't like my cheese braided), and I know that my mom buys Aldi cottage cheese because it has lower sodium than most of the major brands (probably negligibly lower knowing my mom, but if you've got to watch your sodium
really carefully).
I think I may have been responsible for getting my ex-boyfriend to shop at Aldi for the first time. I don't know that he's gone back, but in the one or two times we went together, he had success with a standard loaf of wheat bread, some bagels and a ham he prepared for a holiday dinner.
It's already been said here by Mhays, nr706 and maybe others, but if you live anywhere near Skokie, the Marketplace and Aldi combination on Oakton has got to be one of the best shopping situations one can have. I have to rely on the Marketplace for fufu mix

, but I can get the majority of my dry goods at Aldi.
I've also long thought that Whole Foods and TJ's should adopt Aldi's bag policy. The way Aldi does it--recycle boxes, bring your own bags or buy their sturdy, reusable plastic ones--strikes me as a much more effective way of reducing use of new plastic bags. It really irks me that Whole Foods, in particular, doesn't do this.