Both of us naked (or her with just her shirt on), while she's laying on her stomach. Then, I get blown while she has her head just a little off the bed.
That way I can move her head and she just rests there on her stomach and not have to support herself and not get tired. And her hands are free to do what she wants with them.
Seeing that butt wiggle around while she's doing her thing is a close second to the feeling of the whole experience.