Doncha have a yard? Why restrict yourself to pots? Dig in the dirt!
I have bad soil, very few sunny spots (lots and lots of trees), and two kids who cannot be trusted not to tramp on things. Plus, Wombat told me last year that container gardens are easier than they look, and I want to start small.
I don't want to invest a whole weekend in building a raised bed (which is a must, given my yard situation) and find out that I can't grow anything, or that I hate doing it. If the containers do OK this summer, I will probably build a raised bed in the fall and plant some lettuce (which I read does well around here during our long, wet, warm-but-not-hot autumn). That is a vegetable we would definitely use.
For summer, I'm thinking an everbearing breed of strawberries, since I don't much care for tomatoes. The goals are to have some home-grown food to eat each week without having so much that we can't use it all ourselves, and to show the kids how basic agricultural food production works. Has anyone grown strawberries in a container (or anywhere)? Are the home-grown varieties really that much tastier than the store-bought ones?
Eventually, I would like to grow sweet potatoes, carrots, lettuce, green beans, strawberries, blueberries, and a variety of herbs. Those are all things we eat regularly, and as long as I keep the amount I plant to a reasonable amount, we shouldn't have much waste, if any.
But maybe I hate gardening? I definitely have issues with spending too much time outside when it's really hot. At least if it's 95F and I have to weed the strawberries this summer, if it's in a container I can load it on a dolly, bring it into my air-conditioned laundry room, and do it there. And if I have to do that, then I have no business planting things in the ground. None whatsoever.