This is an interesting idea from the recorder maker Adriana Breukink:

http://www.adrianabreukink.com/ADRIANA/INHALEROREXHALER

She divides wind players into "exhalers" - who breathe out actively and inhale passively - and "inhalers" - who inhale actively and let breath flow out of its own accord. The implications for her are that the two kinds of player prefer differently designed windways - open ones with little resistance for the inhalers, narrow ones with more resistance for the exhalers.

If she's right, one instrument where this would matter even more than the recorder is the moothie.

(I think I can be either, depending on the music. Maybe an exhaler most of the time, but for pipe tunes I tend to adopt the "inhaler" posture, with flat fingers).