Earth dancers, as you might expect, are solid. Not necessarily slow, but their feet are on the ground. They are completely immune to your mischievous attempts to tweak them off course. They do not do extra twirls, and indeed some of them don't do any twirls. At their worst, they can leave you thinking how much fun it would have been to stay home and deal with the dirty dishes.
Air dancers are the opposite of Earth dancers.
They never apply any forces that deflect you from your chosen path through the dance, and in some curious way, it also seems impossible for you to deflect them. My theory is that they were ballet dancers in their previous life. I'm not sure whom Air dancers like as partners, or indeed whether they have any preferences. At their best, they are quite graceful, and are remarkably little trouble or effort to dance with. At their worst, they leave you wondering if you have a partner at all.