To dream that you are floating on air indicates satisfaction, contentment and acceptance of some situation. You are letting go of your problems and rising above obstacles. You are experiencing new-found freedom and gaining a new perspective on things. Nothing seems overwhelming or too difficult to handle. Alternatively, floating in your dream suggests that you are wandering through life aimlessly with no goals. You are just going with the flow.
To dream that you are floating in water suggests that you have a handle on your emotions.
To dream that you are floating, but are afraid to move suggests that you are questioning your own abilities. You are experiencing doubts in yourself.