There were a lot of things that fans criticized about the Star Wars prequels. One of the most prevalent was the dialogue in the three movies.
George Lucas discussed and defended his screenplays in the new book The Star Wars Archives. 1999–2005. Here is what he said about the romantic dialogue in Attack of the Clones specifically.
“It is presented very honestly, it isn’t tongue-in-cheek at all, and it’s played to the hilt. But it is consistent, not only with the rest of the movie, but with the overall Star Wars style. Most people don’t understand the style of Star Wars. They don’t get that there’s an underlying motif that is very much like a 1930s Western or Saturday matinee serial. It’s in the more romantic period of making movies and adventure films. And this film is even more of a melodrama than the others.”
There you have the explanation from the man himself. Let us know what you think in the comment section below.