To clarify, I consider TPM to be an awful movie (RLM's video review is the best explanation therein that I know of). With the exception of a few very good special effects, it is just horrid by objective movie-making standards. However, I enjoy it more than the other two PT episodes - because (1) it contains some so-bad-its-good moments of unintentional humor (such as CPY), (2) it looks like a movie instead of a videogame, (3) older Anakin is just so, so irritating I can't watch him for more than about 15 minutes, (4) I actually like Watto, (5) the music during the duel is cool, and (6) TPM at least reminds me of Star Wars when they're on Tatooine.
As I've said before - just because I may enjoy watching a movie doesn't necessarily mean that I think it is a good movie. I also enjoy watching "Plan 9 from Outer Space".