favorites- The Empire Strikes Back and Return of the Jedi(Sorry, I couldn't pick just one!) Least favorite- All the prequels(Hypocritical? Maybe. But I dicho I liked some of the characters, not the plots!)
I actually like all the movies, but if I had to choose a favourite, it would have to be Revenge Of The Sith and if I had to choose a least favourite, Attack Of The Clones. I also like The Phantom Menace, A New Hope, Empire Strikes Back and Return Of The Jedi.