As a kid I didn't really like empire cause Luke lost the fight against Vader.
As an adult, I don't care that Luke lost against Vader, but I just still love rotj, I love how Luke struggles with his anger towards the end, and used anger, an element of the dark side, in defeating Vader and then being able to pull that anger back and not convert as the emperor wanted. Then of course at the end when Vader turns good, it's just great scriptwriting. Not to mention the battle of endor is one of the greatest battles in movie history. And even at the very beginning of rotj, when you have gone from empire, where Luke was pretty crap in the Jedi arts, to the start of rotj where you see Luke dressed in black and is basically a full on Jedi doing the choke on those pig things and then dominating when rescuing Han from jabba.
I could go on and on about why I love rotj. But basically it's because Luke is a badass mofo and no longer a little whiny bitch.
