I started gardening because I enjoy it (fond childhood memories here too), not because of economic reasons, but if I hadn't already started, I would be this year to save money. As it is, I'm trying to grow as much as I can, especially as much storable food as I can. I'm also a recent convert to the organic/local movement, and gardening is the epitome of that.
I've started some crops already--broccoli, cauliflower, cabbage, potatoes, onions, leeks, shallots, carrots, parsnips, beets, turnips, kale, lettuce, spinach, Swiss chard, broad beans. I'd have peas in the ground if not for torrential rains and in-law drama this weekend; they're going in today. Later, I'll be planting tomatoes, peppers, eggplant, cucumbers, cantaloupe, watermelon, summer squash, winter squash, quinoa, corn, beans, sunflowers (mainly to hold the beans up, but also because they're pretty and good for the birds), and a host of different herbs. Also cotton, indigo, and some dyeing plants, but that's for my fiber-arts habit.
Incidentally, compost is as good or better for your garden than manure, I'm told. I have a compost pile and it's very easy, and reduces our garbage output considerably.