Wii Warm Up: Middle ground

Our discussion the other day after the news of the coming Popularity Channel touched on an issue that it seemed worthwhile to discuss: the differences between casual and hardcore gamers, and just where the middle ground might be. Of course, opinions are mixed on the subject, but a couple of statements were pretty interesting. What is too casual? How much depth does casual content need? And how should Nintendo balance content for hardcore gamers and casual content -- or are they doing just fine? Share your thoughts.