Melodic Minor is a pretty sweet scale given that there are no avoid notes. I know that there are tons of uses for it, so what's your favorite? Where do you throw it in? I think a half step up from a X7alt chord works very well (Bb Melodic Minor over A7alt). Gives you the b9, #9, 3,#11, b13/#5, b7 and 1. This might be pretty common but it'll get the ball rollin'. Your turn!