I have a special place in my heart for Episode 1: The Phantom Menace. Yeah, it has a lot of awful dialog, horrible pacing and Jar Jar, but it's the most original of the new ones. George Lucas really tried to do something new here. With Episodes 2 and 3, he really tried to cater to the audience by bringing in as many Original Trilogy elements as possible (e.g. Boba Fett, Chewbacca, the shuttle from the beginning of A New Hope).
I can't wait to see it all in glorious Blu-ray!