I finally made the switch.
I've been considering re-usable shopping bags for a couple years now. But I kept thinking it sounded like a hassle when shopping for a family of five. How many bags would I have to accumulate before I had enough? And carry them all while shopping?
But this summer I decided to buy one or two bags each time I shopped for groceries. By the time I had six bags, I already had enough. They're much bigger than the typical plastic grocery bag so I don't need near so many. And re-usable bags are so handy in an apartment when I can't park right in front of my door. I can carry all the groceries at once since the bags can slip over my shoulder. Though it would be easier to carry in more than one trip...it's an awkward 100 meters from my car to the front door. They're super handy on my quick walks to Kroger. It's a much easier way to carry a gallon of milk home.
Overall, I'm happy with the switch. It feels good.