I am most definitely on Team Ground. That is where my plants have the best chance at living a long life.
That said, I do have some containers that have done well. But they consist mostly of succulents and don't care if they miss getting watered.
I did grow some wonderful Coleus last year. I am still amazed at how beautiful they were. I must admit, my success was do to the help from a great bunch of people here at ATP. I will be growing them again this year, along with the geraniums that made it through the winter on the covered deck. We had a very mild winter this year.