The biggest problem with Episodes I and II is that they really lacked the snappy dialogue of the original trilogy.
To wit:
"Watch your mouth kid or you'll find yourself floating home."
"We had a small radiation leak, but we're fine here...everything's fine...how are you?"
"Were you afraid I was going to leave without giving you a goodbye kiss?"
"I'd just as soon kiss a Wookiee."
"I can arrange that!"
The closest thing the prequels gave us was:
"We came to rescue you."
"Nice job."
Other than that one line, there aren't really any memorable quotes at all. The banter between Han & Luke and Han & Leia is what made the originals. Even contrast the romance dialogue:
"You like me because I'm a scoundrel. There aren't enough scoundrels in your life."
"I happen to like nice men."
"I'm nice men."
"I love you."
"I know."
vs.
"I don't like the sand. It's coarse and rough and irritating--not like you. You're soft and smooth."