Favorite aircraft is 717 because of the smoothness of the ride and how quiet it was. Favorite airline is Southwest, because they're ran well, very friendly, and I have never had a bad experience with them. Plus, their staff is hilarious!!
QANTAS. 747 or A380. NYC-SYD I get free food and drinks (inc alcohol) the whole way (Code shares get nothing, not even a pillow for free on the domestic sections). Great snack bar at the rear and they give you a snack bag after dinner (leaving LAX or SYD).