I am no PT defender, but AOTC is the only Prequel movie I enjoyed. I thought TPM was too kiddy, and I thought ROTS just dropped the ball on too many key issues that try to tie up the 6 movies, but AOTC kinda was a standalone movie to me in some respects.
Of course the Padme/Anakin romance is horrendous, but I totalled it once, and it came out to about 12 minutes of screentime they had together that would make you puke. So only 5% of the movie gave me the dry-heaves:)
I think I enjoyed AOTC simply because it is Obiwans movie, and he is the only character I reallly cared about in the PT. I liked the whole Kamino part and thought his fight with JangoFett was good too. I was always suprised that many fans missed a funny line from ObiWan taking a shot at the Jedi Council, "R4, send the signal back to the old folks home!"
Another scene I liked was when Count Dooku was tempting ObiWan after he was captured on Geonosis. Again, maybe this comes down to me being a huge fan of Christopher Lee, but I like the line, "Join me ObiWan, and together we can destroy the sith!"
Overall, the ending to AOTC is the best of the PT cause it sets everything up for what should have been a great third movie, as Dooku meets with The Emperor, Yoda/Obiwan/Windu discussing the upcoming Clone Wars, then Palpatine is overseeing the formation of the Empire, while Padme and Anakin are secretly getting married, great montage!
Then we get to Episode III, and Lucas just fucked that movie up royally! Geez, what a huge letdown, but we've been down that road before....