Mrsflowers to NGA!
My goodness! In one word...Absolutely! As the years have gone by for me I find that I'm doing a lot more container gardening. My knees aren't as good as they used to be, and I find working with pots to be much easier. Even a lot of my veggies are growing in containers.
Look through the Plants Database at different plants you're interested in, and in the plant info section, a lot of them will say whether or not they are suitable for containers.