I love the dialogue in ESB - witty banter, sexual tension , life-lessons and techno-talk. It's good. It was great when I watched it for the first time as a kid in the theatre, I learned so much more about the SW universe! It was mind-blowing back then, a thrill-ride which seemed to offer me some depth and understanding of something bigger than myself - the force, spirituality..whatever you want to call it.
And that ending - it was sublime...never since has an ending promised so much, made a kid wait for so long and...delivered so little!
Aw, I don't really mean that, I love ROTJ too.