I love hornpipes too, though I wish people didn't play them so fast these days (at least here). Excessive speed makes the melody lose that elegant swing and all its rhythmic subtleties. So many of them now just come out sounding like bouncy reels that it's often hard to tell the difference (if there IS one).

Particular favourites of mine are The Independence Hornpipe and The Bee's Wing, both of which go into triple-meter in their last sections, so it makes quite an effective pairing.