We used to reuse our plastic bags for dog poop bags, for packing lunches, etc. Now we just have to buy plastic dog bags, etc. And then there's the annoying thing when I go to buy something small at the store and they have to put it in a large paper bag.
Also, our reusable bags, especially the ones for lunch get really gross, really easy. And there's no way I'm getting 130 uses out of it (see article link)