This will be something debated until the end of time.
Original Trilogy
Prequel Trilogy, my vote
Sequel Trilogy
Ngl, I almost - ALMOST! - put the Prequels above the Originals, and heck, I even voted Prequels. And even then, I know that I'd be lying if I said I love all three of the Prequels. So yeah, I think it'd be hard to say that the Originals aren't one's favorite trilogy, because it did well on all fronts. But still, that isn't to dismiss the Prequels entirely, being part of George Lucas's six-film saga. If nothing else, I think it can be agreed that the Sequels are everyone's least favorite trilogy.
Bottom line: Originals are easily the best and arguably one's favorite, but I voted Prequels.
