I love the Luke/Vader fight from Jedi, with the space battle inbetween. I love the idea of Father vs Son, and the music when Luke attacks on Vader's suggestion that Leia be turned instead was easily some of the best. I love the lightsaber battles the most. But all the action was great, outside of the mass ground battle(Gungans vs Droids vs Clones), though the ground battle in II was better than in I.